Most Helpful Guy
It says a lot about him that while he has a "girlfriend" that he is still talking to his ex talking about how good sex was and trying to hook up again right?
Try to pull yourself out of the situation for a second. Imagine it was a guy that you had never met before. And he was doing this to his Girlfriend and ex who is another girl. Is that a guy that you want to be with?
OF COURSE NOT! It seems to me that the guy is more concerned with just having sex than anything else. Definitely not love. I know it's hard to move on, but these kind of actions can be interpreted as bad signs when seen from the outside by anyone and I think it's best you try to see them that way