Staring at me a lot.

Well unless you have 3 eyes I think he finds SOMETHING interesting about you! Just say HI one day!

There is a very good chance he has a crush on you.

Try to talk to him and get to know him, maybe he'll open up more instead of just stare :)

He most probably has a crush on you. To be sure though, and only if you feel that you like him too, you can smile at him when he is looking at you, or say hi as you are walking by him and such. If you get a positive response back, the chances are that he likes you. The rest is upto you.

I would say that there is a chance he does like you. Try talking to him and see how he acts around you. If he flirts or anything with you then he probably likes you. Good luck.