Most Helpful Guy
If guys are broken up, they're going to hook up with girls if they can, even if they wake up every morning crying because they miss you. Sex isn't just some bonus thing in a relationship, they want it =all the time-. When in a relationship they really care about the sexual connection with that person (i. e. you at this point).
Does he still think about them? No more then he'd have thought of any other ex he's had. They probably cross his mind once in a while when he jerks off. He probably thinks of you more even then.
If he wanted to be with one of them, he would be.
Most Helpful Girl
You'll never know if he's lying or not just gotta trust him.