Most Helpful Guy
I would end it. He was hitting on another girl. You are not on the same page as him. I find it a bit annoying that he shouldn't know better, but I'm not sure about the details. I think you are in the right on this one.
Most Helpful Girl
He's Obviously Not into a Real Relationship with you, and Now he is just treating you like some 'Friend with benefits' factor that he can just share stories and spit with. He hasn't moved on from His ex, he's this fickle pickle, and Now he is telling you his 'Unsuccessful story' about other girls. I believe he wants to play the field and 'Play' with you at the same time.
How can he Expect Anything to be Not only a 'good nite,' when he is doing this to you and showing disrespect? It's not fair to you, and you had every right to want to---Leave.
You need to sit down with him and tell him you don't want to be some 'Rebound Rebecca' Nor some pillow pal neither. I think you shouldn't be so easy to go between the sheets with him, unless you don't mind a friends with benefit relationship. This is what I think he wants now.