Re: friends on the outside, more than friends on the inside
Yes, you are right in saying that he is not completely yours. In fact, he is not yours at all. Honey, don't you think that if he cared about you as much as you think he does, that he would have broken up with his girlfriend a long time ago?
Don't get yourself in trouble by seeing someone who is attached to someone else. Imagine how you would feel if you were the girlfriend. Do you really want to cause her pain when she finds out about the two of you? Girls shouldn't do this to each other. I hope you get what I mean.
Give him an ultimatum.....either he breaks up with his girlfriend NOW or he will no longer have you as a substitude.
Good luck with this. I didn't mean to be harsh in any way but the obvious had to be pointed out.