Sorry, this is a long past due response. I have to be honest, if she is a young teenage daughter and you don't get along with her, I'd move on from the relationship. She already has a situation in which one parent lost custody which is a loss to a child. She needs peace and a comfortable home. And a non distracted dad by someone that is not in love with his daughter. She's likely a true pistol at that age. I have teenage boys and lordy, I never imagined how hard it would become during the teenage years. My sweet, adorable boys have become grumpy, non cooperative teenagers! Grrrrr. And I love them dearly and have my moments in which I want to lock them in their rooms. The man SHOULD bend backwards to cater to his children as they are his number one responsibility in life. We have a short time to parent. 18 years goes really fast. I would NOT move in. Date him until she's off to college or moved out and then live with him. It's hard. I dated someone with a child as well. At some point, if you can't love the kids too, then it's not going to work. good luck