If I wrote my dad a letter, I think this is what I would say:
Dear Dad,
I don't know if you are aware that I have decided to stop having any contact with you or mum. I don't know what you have been told, or how much you understand. I'm not happy about having to make this decision; it's very sad for me, in fact.
Have you heard of autism? I have thought for some time that you may have this. I don't know if this has ever occurred to you. It would explain a lot of things, like the way you get really angry and frustrated at times, and the way you sometimes want to have conversations about things and don't understand when other people tell you it's not the right time to discuss it.
I don't think you have had a very happy or easy life; I know your childhood was very difficult. I don't know if you realise that the way you felt during your childhood - scared, powerless, unsafe - is how you made me feel during my childhood. I felt frightened and unsafe. I didn't feel like you loved me.
I do believe that you love me, and that you have always wanted to do your best. I do appreciate the ways in which you supported me, like paying towards my masters degree and my wedding. There have been times when you have expressed concern and caring, like when you said you didn't want me to miss my bus, or slip on icy pavements.
But a lot of the time I didn't feel like you loved me or even liked me. You used to tell me I was ungrateful and disrespectful, but I wasn't. Children automatically love their parents and want to make them happy; I was "disrespectful" because I felt unloved and not listened to, because you frightened me, because you did things to me that made me feel hurt and confused.
Like when we used to go on car journeys and you pushed your seat right back and shouted at me for "kicking" you when your seat dug into my knees. Can you imagine if you were sitting in the back of the car, and someone did that to you? It wouldn't be your fault that your knees were digging into them. You wouldn't have done it on purpose.
I think you felt very scared when you were a child and you thought that, when you grew up, you would feel different. Respected. Powerful. Being the dad would feel like that. But actually you still felt like a scared child, you had all the same feelings, and you couldn't stand it. Your children seemed to have it better than you, and they didn't seem to appreciate it, and you didn't understand why.
You didn't understand that all children argue and push boundaries and don't listen, that this is completely normal and healthy as part of their development. You also didn't understand that children need to learn to think for themselves and survive out there in the world, not just to do whatever they are told without question.
I think it is a tragedy for everyone - you, mum, [sibling], me - that nobody properly questioned your behaviour. That nobody said: this isn't normal, this isn't healthy, you can't shout at your children like this for leaving a tap dripping, this shouldn't be happening. Things were accepted and ignored and swept under the carpet when they shouldn't have been. If they hadn't been, perhaps you would have got better help.
I think you were failed when you were diagnosed with depression, because nobody thought that it might be a secondary symptom of autism; that anyone living with autism would be angry and frustrated and depressed as their family didn't seem to understand them. It must have been difficult and lonely, but it was difficult and lonely for me, too. I was scared of you. I was scared in my own home. I never felt safe as a child.
I have stopped contacting you and mum because it is necessary for my own mental wellbeing. It got too hard pretending not to have any feelings about any of this. I have no idea how much you even know. I don't know if you are aware that I tried to kill myself when I was 16 and I thought nobody cared if I lived or died. I don't know if you are aware that I had a breakdown in 2012.
I never wanted a life in which I have no parents, no childhood home to go back to, no dad to call when I need my dad, no mum to call when I need my mum. I didn't make this decision lightly; I made it to protect myself, because it was too difficult spending time with you. When you glared at me when you felt angry, I felt like I was nothing. You did that right before I walked down the aisle on my wedding day. You're not supposed to do that to your daughter before she walks down the aisle.
I have the compassion and the empathy to be able to understand that you did not choose to hurt me, that all of this just happened, that you wanted to do the best for me, that you love me, that you didn't wake up one day and decide to bully me and frighten me; I don't know if you even understand that I spent my childhood feeling bullied and frightened. I didn't know that wasn't normal. I'm not sure you did either.
Mum pretends everything is okay, and ignores problems, because she doesn't know how to do anything else. I feel sad about that. I don't know if it would help you to get a diagnosis of autism, if perhaps that would help you understand yourself better and help other people understand you. I suspect it is probably too late. Some people would say that, if you had it, it would have been picked up, but it is very common for it to be missed. The diagnosis didn't even exist when you were young.
In an ideal world, what would I want? I have never felt able to tell you how I feel, or what I want. I wish you would write me a letter (but I am too afraid to talk to you because I am convinced you will just call me ungrateful and say hurtful things to me). I wish you would tell me that you love me, that you are proud of me, that you didn't mean to hurt me, that you are sorry.
To get a diagnosis you would need to see your GP and ask for a referral. You could also call the National Autistic Society's helpline on 0808 800 4104 between 10am-4pm on weekdays (not bank holidays) although it can be hard to actually get through. If you try to do this, call 0808 800 4104 and then select Option 2 when you are given options.
I would be willing to see you in the presence of a neutral third party, such as a therapist; the National Autistic Society has people who might be helpful for this. If you are willing to do this you could write me a letter saying so and I could arrange it. I would also be willing to see mum in the presence of a neutral third party, such as a therapist. I am not willing to see either of you without someone else there.
I do not want you to come to my house. You cannot call me because I have changed my phone numbers. It is entirely possible that you are really angry with me for stopping contacting you, and you don't want to hear from me. It is also possible that you don't actually understand what has happened. I wanted to at least give you a chance to understand.
When I was little you were really kind to spiders. You taught me to rescue them carefully in a cardboard tube and not hurt them. I never understood why you were so kind to them, but not to me. I keep hoping there is a reason, like maybe you have autism, and it's not just that you didn't love me. But perhaps I will never really know.
Your daughter
Am crying now. Not sure if I should send this, or just try to let it go. Sorry it's so blardy long.
Don't know what it says about me that I don't just hate him for ruining my childhood.