Pay attention when he talks to you. Make sure you get a genuine interest in things he gets excited about. Get to know his likes & dislikes.

TIPS:
- Don't worry if you find out that you 2 don't have very much in common. That doesn't mean that you guys can't be friends.
- To know him better, play a game called "Confession Circles"; a game where you ask each other questions of any kind & your partner has to say the truth no matter what (you only have 3 saves).
WARNINGS:
- Don't "interview" him. In other words, don't ask him questions as if you are interviewing him. He may find it "stalker-ish".