First of all, you have to find out whether you are drunk or just like that. I think you definitely don't love her, or at least treat her as a friend's wife now, but he can't say. Maybe she loves you, or she is a slut. Actually, don't worry too much. You can talk to her and find out what she thinks first, but remember not to let your friends know, and be careful that similar things will not happen again in the future.