Yep, it's hard to flick that switch on again when it's been shut off by rejection. I described it up thread as a defence mechanism. Would you agree?
Definitely, I feel this is 100% the reason. I had enough of the will we/won't we thoughts, If he thinks I'm going to try with him the feeling that his arm around me is made from stone if (God forbid) I lay my head on his chest, enough of stomach turning at the thought of initiating then his rejection and more than enough of feeling like a big black, depressive curtain of fucking doom was hanging over our bed as I waited for the peck goodnight then his rolling over as he fell asleep while I often silently sobbed :(
no matter what we are doing or what we are talking about, in the back of my mind there is always a little voice saying, "Why don't you want to have a sex with me?" Yes to this and also yes to what someone previously said about becoming sex obsessed - that's how it makes me feel too.
My Dp takes my bringing up the sex subject as a personal attack (I'll admit it often has been when my hurt and resentment has boiled over
) he once said that I was a fucking nympho 
Jesus! forgive me for wanting more intimacy between us - my reply to his comment was ' If I was, I certainly wouldn't be still in a relationship with you, would I'
As I said in my previous post he does try to reassure me (what's the fucking point really as it doesn't) I don't believe that he finds me attractive, I find myself irrationally creating bullshit 'he's only with me because.... insert a whole shit load of reasons'
I'm also told I'm his best friend and It really feels that we are cohabiting mates, I feel so sad to write that but I don't fucking want nor need another friendship - I want and need a lover. :(
Also begged him to just be honest and tell me why, no matter how bad it was, it couldn't be worse than feeling worthless, we could both be happy in different relationships, we deserve to have happiness, just tell the truth god damn it! Nope (sighs)
Religion was mentioned earlier - Dp is RC - was raised in quite a strict religious country - however I don't think this plays a part with him.
What I feel could possibly hold something is the fact he was emotionally scarred at around 10 yrs old by his mother conducting a lengthy affair (he's 32 now) he is still hurting from it - he also found she was at it again around 6 months ago.
He's not a women hater or anything like that, doesn't generalise that 'all women will cheat' or anything similar but he does have issues which could be helped if addressed properly.
ED was mentioned also - Dp has now caused himself PE - because its so long between intercourse he seems to have over sensitised himself to the feeling of a vagina - it's over very quickly. It adds to my frustration but I don't comment at all as A) it will possibly make it worse and B) we don't fecking have regular sex anyway for it to bother too much :)
Thanks once again to all who have posted x