I think that only you can make the decision as to what would be the best choice for you.
Given the status of things, are you sure that going wouldn't be perceived as 'clinging'?
Or would not going be seen as 'more of the same'?
I'm not sure how useful it is to be discussing raising kids as he's breaking apart his family, but that said: is it possible that your stance of telling him he is too immature or focused on 'good times' is only speaking to what is worst in him?
It could be that the part of him that wants to have a family is a part that really wants to be responsible and achieve a healthier balance in his life. He may be feeling his age and getting anxious about some plans that he has in mind but hasn't moved forward on. Not to suggest you should be considering having his baby anytime soon (in fact I'd suggest that option be taken off the table for the time being) but perhaps there are things about what he is trying to convey to you that in your response he feels very invalidated.
Enjoy your chocolate!
M: 32 W: 29 T: 9 Years M: 4 Years I hit rock bottom: 2/11 PA admitted: 4/11 WAW: 5/11 D filed: 6/11 now: Patience, wisdom, and growth - hopefully.