Jennifer- You have lots to think over with Ellie's comment/suggestion. I want to add that I wish I had known for sure that my ex was a devoted man before we got married. I thought that getting married would make him devoted, but I was wrong. He was a leaver before when things got stressed, and he is still a leaver. The marriage didn't change him fundamentally (added more guilt probably about his leaving tendency).
I think that you will be a fantastic mom whether he lives with you or not. And your baby will feel loved and cherished whether he lives with you or not. It is always best for the babies if the parents are rock solid together IMHO. I think you can definitely be a rock solid parent without having SO married or living with you. Can you act as if for now if you don't beleive while SO flounders? Does this make sense?
(I never thought I could make it on my own, but I have 2 incredible healthy kids after 2 divorces now-it's not ideal for sure, and there will be junk down the raod perhaps, BUT I am jsut sayign I wish I had know for sure that H2 was devoted b4 the ceremony)
Thanks for visiting my thread! You always give me such sound gems of truth and advice.