How can I get to know him better?

So I met this guy who is going to be a freshmen at bandcamp. On our last night there i told one of my guy friends to sneak into my room and bring a friend or two and he brought the freshman guy. He plays trumpet and I'm on the dance team (we dance with the band) called the arcettes. So anyways me and the freshman guy hit it off pretty well but the thing is that he doesnt have a phone or a facebook.

A few days later I ran into him again and we said hi and talked for a little bit but nothing long, but we flirted [:

Anywho I'm going into my sophmore year and I know I won't have any classes, but how can i try to hang out with him outside of football games when we perform?

I dont know how to hang out with him without being able to text him, but i could maybe get his home number eventually? lol idk is it weird that I like a younger guy? he's such a sweetheart :D