Wat do u think he thinks?

He sounds like he just is being friendly. Doesn't sound like he is putting any moves on you. He has a GF remember. Keep talking to him but play safe.If he tries to make a move remind him of that fact. Think of how you would feel if you were the GF and found out some one was creep-in with your man. If he ends the relationship go for it. Relax and enjoy the friendship