T.C.
The first thing you could do would be to get married to offer her a much more stable environment. Once that baby is with you, you will care and love her as your own. If you and your boyfriend split up you risk loosing her because you will not have any rights over her well-being. Yes, this is my opinion, but that baby has already started life precariously and she doesn't need to be in an environment that can once again change at the drop of a hat without regards to her. You will be so involved with her and if you are to be the mother figure in her life then you SHOULD be her MOTHER! If you don't, chances are you will end up in a very ugly situation in the end. With you married to her father, the courts will see that that's baby'e best interest is in your and your husband's hearts and minds. If he doesn't want to marry you now, he won't later. Don't set yourself up or an innocent baby up for unnecessary grief and hurt.
Yes, it's my opinion, so don't anyone write me back about how awful I am for saying that. I don't mean it self-rightously, I am not judging and I am not being cruel. But maybe if people took the job of being a parent and a spouse more seriously rather than quick shak-up living together the children in this world would not suffer so much! He already has a child out of wedlock and is with another women BEFORE that child was born! A baby doesn't just happen.