My girlfriend says she doesn't love me and we have a baby!?

nb-sandoval
I have been dating this girl for about 4 years now and just last year we had a baby girl. Now my little girl is the light of my life and I love her mom very dearly, but a few weeks ago she told me that she doesn't love me anymore and wanted to move away to start her life. Well this upset me pretty badly and she said she was moving in with her guy friend who she recently met again after so many years away from each other, and she told me that he was her first love. Now I couldn't help but be a little mad and the only thing I could think of was my little girl and what would happen to her. After about an hour of talking to her I told her that if she moved away, I would take my daughter and care for her. (I have a steady job and it pays pretty well) And after I told her that, she was upset but understood that she wouldn't have a job and I was able to care for my daughter just as well. But as we were getting ready to go our separate ways, she broke down and said she couldn't leave our daughter and said she would try to love me again if she could stay with our daughter. Its been a few weeks since that incident and my girlfriend says she loves me but I know it is forced and she still talks to her guy friend while I am at work. I don't know whether to continue the relationship for our daughter's sake or just let her mom go with her friend while I care for our daughter. I feel that after so many years of me being there for her and my little girl that she is just throwing it in my face to be with her friend and leave me. I love my daughter more than life itself and all I want is the best for her. Does anyone have any advice on what I should do?
My girlfriend says she doesn't love me and we have a baby!?
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