Do you think you can grow to love someone?

My friend got with his girlfriend as he accidentally got her pregnant (not planned, she's 1 n a half now), but he keeps telling me that he doesn't love her. He says that they're 'trying to make it work'. As a friend, I really want him to work it out and stick with her as he already has a little boy to another woman (which wasn't planned either). I told him that he needs to work it out, as they keep having problems etc, but he doesn't like it when I talk about it. He also says that he doesn't want to disrespect her by talking about it. He avoids the topic like the plague even though we speak everyday, and he prefers to talk about me and what I'm upto etc..

My question is; Do you think that you can grow to love somebody even though there are problems from the onset? Or will it never work?

I just want him to be happy. I don't want him to keep making mistakes.

Thank you.