EscapeInThePark Yes - this is the thing. His symptoms have anxiety written all over them. They're kind of textbook! Whenever we get back together he literally wakes up in a pool of sweat, and I have to calm him down!
(As someone above said - OUCH! Nice to know that I can bring someone out in a panic attack... It try not to take it personally) 
I don't have children, and yes, I do want children, and at 35, now is not the time to be wasting any more months with this man. I do know that and that's why I'm looking for advice on how to just LEAVE HIM. Cos that's what I want to do, but it's just been hard.
Someone earlier mentioned about was I happy having an unconventional relationship....it's a damn good question and I concluded that I wasn't.
I admit I am not the most radical of people and inspite of thinking I'm a good feminist, I do yearn to 'settle down' and have kids and be married (or at least long term partnered up). God knows why - but for some reason I have that desire imprinted somewhere deep in my psyche.
So I wrangled with this - is all that social conformity really necessary?
The fact that I felt the need to explain it to my boss was because the invitation said 'partners welcome'. Well - it's a new job, but she must've known I didn't have a partner as I'd never mentioned one. But her party was near his town, and i'd be staying at his obviously, and he'd be driving me there, so..... But yeah. I probably didn't need to go into it. I think I described him as 'It's my ex-boyfriend and it's a bit weird', that's all. But I think I do crave social acceptance, and that's a part of that.
I don't know why I do. I've just come back from a month working in one of those countries where the first question people ask you is whether you're married and have kids. It was okay fending off the questions when I was in my 20s. Now I'm 35 it actually feels kind of shaming..... A bit 'No, I'm not married; no, I don't have kids', and as a certain Ms B. Jones almost said: 'And please excuse the scales I'm shedding on the floor'......
So yes - in answer to your question, I think I do hate feeling outcast from 'socially approved' relationships. And so the relationship-in-all-but-name he gives me is not enough. If I was older - I think it would be okay.