Rejection sucks. And we all go through it. If he thinks youre a stalker chick after calling him when he gave you his number, then he's an idiot and it's good you found out now.
Don't play these stupid relationship games. Give him a call, if you get his machine just tell him you had a good time and you'd like to see him again. If he calls back, great, if not, then screw him. If you talk to him, tell him the same thing.
No biggie, no pressure.
Of course, it's all easier said than done
Good luck, and let us know what happens!