When I was with my Ex, I was honest with him from the start, said I really wanted children and now, had been trying 7 yrs with EXDP, we had year tog, then he said I'll sell the car and we'll have IVF, (had been told natural conception cahnce, nil).
I had a colposcopy, and another laproscopy, 6 wks later I was preggers, >He said its me or it, so I moved out Tosser.
My dd is now 14, we went on to have another dc, my ds1, now nearly 12 but split up for lots other reasons. He always loved the kids in his own way, but has never been a good dad, if that makes sense, he's just not daddy material.
Sadly, they know this, and to be brutally hones, they use him now cos they see him very infrequently and he always buys them stuff. They love him cos he's their dad, but my dh, is the person who's been there when they's being sick in the night, when my ds is winning footballl trophies, and when my dd had a night out in a limo for her 13th birthday.
He'll buy them a car when they're 17, kids are very much looking forward to this, but I wonder who'll be walking my dd down the aisle? It certainly won't be him.
I think what I'm saying is, perhaps prepare yourself to be the primary carer, if he feels that strongly, then chances are he would resent the child, I know my ex did, and still does.
It's ok, you can do it, if it's not him, then Mr right is till out there, mine was.
Hope it works out for you.