How does he treat you? Kind, considerate, talks softly, doesn't belittle you, praises things you do? Does he do things just to please you or surprise you? Is he tender when he touches you? Does he let you know if he's going to be late? Does he talk about a future with you? He may not possess all of these qualities, but if he has at least half, I would say he cares a lot about you and is a good catch.