So sorry in advance for the length of this post! My parents are literally pushing me to the end of my tether.
Background - I've been overweight for some time. At first I was just a few pounds too heavy, but now several stone (this is over the course of years from about aged 13 onwards). Understandably, my parents are worried; being overweight is very unhealthy and dangerous, but I am a married 26 year old adult and am in control of my own life. I'm proactively trying hard to lose weight and improve my fitness (I want to shift the weight before I start TTC so it is at the forefront of my mind).
For years and years, every single time I see my parents, my weight has been brought up in conversation and criticized.
Some examples:
- They will invite me to a meal for someone's birthday, wait for me to order and then ask loudly 'Should you be ordering that?' in front of the waiter and the whole group.
- My DF comments negatively on what I am eating for my lunch every single day. To the point where I have started eating in my car to avoid it.
- If I haven't seen her in a week or two, my DM will look me up and down and say 'Oh dear, how's the diet going?' with a strained look on her face.
- When shopping with DM, often if I point at a top I like, she will say 'That's nice, but it's really a slim-person style isn't it'. She will also always ask if I want to go into a designer shop which only stocks up to a size 16, and when I say not particularly, she will push me and push me for a reason why, until I admit that the clothes won't fit me in there. She already knows this. The day is then spoilt as I'm upset.
- They are pleased for me if I have a week of big weight loss i.e. 4-5lbs. If I lose any less than this, between 1 and 3lbs in a week they say 'oh...' and do a sympathetic face. When I say that I am still pleased, they say 'yes but last week you lost X amount, you must have eaten too much cake'
- I wanted to audition for the lead female part in a local musical and was told by DF 'I think it's a slim dancer type part. So don't get your hopes up'. When I got the part (partly to spite DF), rather than congratulate me, he said 'Oh, an incentive to lose the weight then'.
Friday was the last straw when I casually asked my DF's advice on what we could make for dessert for our dinner party over the weekend. He replied, "You don't need dessert. Neither of you do". (DH is not even overweight) I found myself in tears on the drive home, wishing I'd said something.
When they make these comments I try to tell them they hurt my feelings or sort of say "oh thanks a lot!" but they just say it was a joke. It is not a joke to me - It feels like prolonged bullying. At the moment I hate leaving the house and haven't seen my friends in months, feel anxious all the time in public and I've started to imagine that people are staring at me in the street all the time. It's also affecting my sex life with DH as my size is always on my mind and I feel huge and inadequate, despite the fact that I am losing weight.
Last year I sent my DM a long email (find it hard to say in person without becoming emotional) telling her how I felt, and she didn't even reply or talk to me about the email, just stopped the comments for about two months, then started up again.
To cut a (very!) long story short, here I am and I don't know how I have allowed this to become an everyday acceptable norm. My DH and friends that I confide in about it are shocked by the things I tell them and tell me I should put a stop to it - I just don't know how.
The irony is that the more they pick on me the more I feel like packing it all in and just wallowing with Ben & Jerry's 
How do I get out of this vicious cycle, without having a full on family feud? I wish I could get some space for a few weeks, but I live around the corner from them and work with my DF every day in the family business
any advice would be great as I'm so stuck.