Actually, I think he meant he hasn't met the daughter's father.

I can understand how the child can make you feel like you should try harder, and I definitely agree. Once there is a child involved in a romantic relationship both partners should take things more seriously because what they do can effect the way the child feels and that's important to protect. But if you are unhappy, that's not setting a good example for the child either. It seems like maybe you have some trust issues, but aside from that you only fight about little things? Am I right about that? If that's the case and you do love her, then you need to talk things out and try to work everything out. I would say you need to decide one way or the other fairly soon because the longer you are in the daughter's life, the more painful it is going to be for her when you leave.