What's the difference between "going together" and "being committed?" How long do your teen's peers stay together? Do they make any kind of commitment to each other? Are there certain things boys want that girls don't? Are there things girls want in these relationships that boys don't want?
Your teen may have very set notions about the roles of males and females. A boy may have the mistaken impression that guys are always in control while girls are supposed to follow along. You may be happy to hear your teen thinks mutual respect is a key part of any relationship. You will only find out by asking questions.