Quoting pilot Jess:" He doesn't sound like a guy who is in it for you for thick or thin anyways, so why do something that ... [snip!] ... you'll someday barely remember. And there are good men out there who will love you, two babies and all. Hang in there mamma."
This is almost exactly what happened with me! We were talking more about adoption, but he said it was really up to me. Whatever I chose, he was going to support me... I can't imagine what I would have felt like if he had been like OP's bf... And here I am now, 23 weeks along and still with him, supporting my decisions 100%.
To me, that's a real man.