How can a woman tell if a man loves her or just wants to use her for sex?

Relationships are built on conversation! Sex is about what feels good! If a man is really interest in you, he'll ask you questions. That's how you get to know another human being. By talking! If the man really cares for you he will ask you about your life, what happened to you before he met you, how you are managing your life now and what you hope for the future. The questions might not necessarily come in this order, but it is his interest in you that will indicate whether he cares. Read more about relationships in Meyer's "Marriages, Shack-ups and Other Disasters" and check my Bio page for other recommendations.