Pregnant and he's wanting to leave

[~¤DG¤~]

Honestly, I think some day, regardless if you two stay together or not, he will regret how he handled himself during your pregnancy.
This is the time when he should be supporting you and being there for you. You don't need all this extra stress.

Do you think you'll end up resenting him for his childish behavior?

I am about 90% positive that he is going to fall in love with this baby once he sees her and really feel like an a$$.

You ARE doing great.