wen he met me he was really chatty and attentive ( i would never have had a relationship with the man he is now) i feel tricked in way
This is completely natural for us introverted types. We have episodes of coming out of our shell under certain conditions. I think the main thing is that we (or at least I) need a certain amount of quiet, non-talking/interacting time in my day. I almost need to budget where I spend my interactions. If I get involved in an engaging conversation with someone, I enjoy it but I still need a break later. Conversations that don't interest me really drain me. He sounds like he's in a "mood" when it comes to your relationship and anything you say may be in that uber-draining category.
What you can do is try to find that connection to make it interesting and engaging to him. It'll break down his resistance and get him out of his shell. Once he's out, it'll be easier to (gently) address the things that are bothering you. I'll give you a hint: general questions ("how's things") are going to come across as tedious to him. Instead, in casual conversation he'll respond to specifics much better.
h: I'm going out on thurs
me: cool
me: shall we do something this week
h: yeh ok
me: wat
h: not sure will let you know
me: shall we go and see a band
h: no
me: why not?
h: i don't like them
me: well come and have a beer it will be fun
h: no thanks
I understand that you'd like to get him engaged and give him the opportunity to do something that he'd like to do, but asking him out and then putting the responsibility to figure out what to do on the spot probably turned him off. It was good that you followed up with a specific, but you probably already lost him at that point. Suggesting specific up front are a good way to go. If he's checked out, he may not go for anything, but you chances are much better to suggest something specific you know he enjoys.
or if i say - we have not chatted in 2 days or you never want to go anywhere with me he just says "its all my fault is it, never yours"
i want to scream yes it is!! but try and stay calm
He's deflecting, and that's infuriating, but your also putting him on the defensive. Even if he is 100% to blame, be open to sharing that blame a little. If we're being honest with ourselves, we all have a role to play in these situations. Keep working on this conversation to get to the root of the issue, but keep it constructive and positive. Let him know that you want to get to a good, fun place in your relationship, it's not there right now (again, not judgmental, just stating a fact), and your looking for ways to help. There's a root cause here somewhere and he may not be able to articulate it (it took me years to understand what was wrong in my relationship at a deep enough level to want to talk about it)
The "it's all my fault" line is his dysfunctional way of telling you that he has a beef with you that he's either trying to work out in his head, he's not ready to express, or is just so far gone that he doesn't want to tell you about. Your dysfunctional response is that it is *all* his fault. Know that he may very well have a legitimate issue somewhere deep down.
Ask him if he's happy with how things are. If he says, "yeah, sure" then give some examples, "we just don't seem to interact anymore. There's no intimacy..." etc (I'm making stuff up here) "is that okay with you? is that what you want?" Hopefully you can dig some stuff out of him and respond from there. Again, DON'T ATTACK.
If you can get him to openly address the "what do you want out of our relationship?" questions then you're doing well. If he's unwilling to answer and unwilling to think about it then you have your answer: he's checked out.
i am starting to think i should just shut up and accept this is him - he doesn't beat me or drink so i guess i should be lucky- but i feel so horrendously alone and sad all the time - i have no confidence anymore and most of all i don't know what to do to make it better- other than leave him alone and let him do what he wants - which leaves me miserable
Accepting that this is the way he is and accepting that this is what makes you happy are two different things. I know that I come off as distant and aloof. I make an effort to show closeness and engagement with my wife to compensate. Your guy may not be willing to make the effort.
If he does make the effort, try not to abuse the situation by selfishly yammering on about something that will make him regret his efforts. I'm not saying you do this, I'm just warning to tread lightly.
If he wants an engaging and vital relationship, he'll make the effort. If he doesn't, he'll evade you. It may require an ultimatum for him to snap out of it and realize what's going on.
Back to your original question, a guy like this will put his head down and slog through an unhappy marriage until he either can't take any more or figures out an alternative. He may never reach either of these.
You're probably thinking to yourself "ugh, this is f'd". It can be hard to get through to the silent types. Like I said, if he wants this, you'll see his energy change. Then again, you may just decide that it's not worth your effort.