Should i ask him to sadies?

I like this one guy that is a junior, and i am a freshmen. I would really like to ask him to sadies, but we havent exactly spoken before. unless you count him bumping into me and saying sorry. I am not sure what he would say though. it seems like every time i see him he is looking at me and when i smile even if it is not meant for him, he smiles back at me. idk if he likes me or not. i like him alot and should i ask him to sadies? would he say yes? does he like me to? help me please. and i dont think he likes me because he has alot of friends that are girls, and is always talking to them. he could do so much better than a freshman. help?