Think my relationship might be over.

[Mochitum]

Been together 18 months.
In the beginning everything was perfect, no games, just honest communication and nice times together.
Now sometimes I feel like he doesn't even like me.
We did have great sex but that has gone down hill massively in the last few weeks.
I called him yesterday for a catch up and he snapped and me and started ranting until I put the phone down.
I was expecting an apology but none has been forthcoming and I've not heard from him since over than two texts where he denies snapping or shouting.
I can be over sensitive as I grew up in an abusive household with lots of screaming shouting and throwing things around so I have a very low tolerance for behaviour like that, it just makes me want to run away.
I love him and thought this was it but I'm starting to wonder if Im cut out for relationships.
I don't know what to do.
Part of me wants to just end it, the other part wants to just have a happy life together as he has so many qualities I love and we have so much in common, I've never loved anyone so much before.
I think he is expecting me to apologise but I'm not going to.

I've noticed he doesn't ever really apologise.
Recently we went out for a meal and he took a phone call at the table and was texting someone which I thought was bad manners.
He came over at Christmas to meet my friends for the first time and wouldn't sit down at the table, eat or even sit on the sofa next to me and it was embarrassing, he does have social anxiety but he's met my other friend who was also there before and he's been to mine loads so not sure.
We have no firm plans to see each other even this weekend let alone anything in the near future, I feel this is showing a lack of commitment, we haven't booked anything for the new year yet.
Last year he went to work on the day we went away for a weekend and also my birthday.

A relationship should make you feel happy and comfortable. It should be nurturing. It doesn't sound like this man does make you happy. You should not put up with verbal abuse. It doesn't sound like he makes you and your needs a priority anymore.

I've always had problems in relationships, feeling anxious, triggering of eating disorders and I didn't have any of this with him in the beginning it all just felt so easy and right.
He does look after me and will do things for me like driving me around, fixing things, making sure there is food that I like when I stay over.
I'm not sure if it's me and my issues or him.
I just wish his default would be to be kind to me and it isn't but I also snap sometimes so maybe I'm just a hypocrite.
No I'm not happy at the moment but I have been very happy with him up to recently.
I don't know.

The relationship is over or it definitely should be. He is making his exit and wanting you to be the one to end it. Don't be a doormat. End it and spend a lot of time working on yourself.

I think you're right. I'm sad. I really thought id found someone I could be happy with but it's just not working..
If he could apologise I would reconsider but it doesn't look like he's going to.
Like he never has.

If he is going cold with his feelings for you then he's being rather unfair to you n the way he's dealing with it. Prepare yourself for things to get worse and I agree with another poster in that he could be acting this way so you are the one to call time on the relationship. It could of course be something else entirely, hmmmm.

Something else like what?
He does get stressed and anxious about things but we don't we all.

No idea! Communication between you both is probably not what it should be. If you genuinely believe you have done nothing to cause his behaviour and he's unwilling to explain himself then it's your decision as to what comes next..

I think, whether this relationship is ove ror not, you should look into getting therapy. You've already expressed how your upbringing echoes into your present so perhaps it's worth resolving those feelings and investing in yourself for the future