Just over 8 years ago I was 7 months pregnant with dc 2 (ds was 2.5). Three days before Xmas, he told me he wanted to leave me.
It had taken 3 miscarriages and 4 lots of IVF to get to this stage.
I, too, hoped that the new baby would make him 'see sense' and we would all be a happy family after all.
That didn't happen and he finally moved out when dd was 6 months old. It took til that Xmas to finally realise he was never coming back.
It was hard, I lent an awful lot on my friends and my parents, despite living 1.5 hours away, were my rock.
But do you know what, I look back really, really fondly at those times. It was just me and my gorgeous children. I was in control, they were with me, he was missing out and I felt strong, really strong by the end of it.
I did meet someone else and we have gone on to have dt's, but at times, I do admit I look back and wish it was just me and the kids.
You will cope, he can still come to your labour, the child is after all his. If you don't like each other, there is not point being together.
Just please, please don't let the children think you hate each other. Stay 'friends' for them. My ex and I are actually good friends now. I wouldn't want to get back together with him but I do sometimes think it is SUCH a shame that what happened, happened.
I am waffling now, but your story really struck a cord with me because it is so similar to mine. But you can do it, if you do split up.
Good luck 