how old are you? if early teen its understandable, everyone reaches that awkward stage in life. remember when we used to look @ guys with cooties, just friends who used to push you around on the playground? as we get older the feelings change and it takes time to adjust to the whole dating/more than friends situation.
As my shyness kicks in, I notice the guys who can break the ice, have a very good sense of humor- type of personality.
You guys could talk about that horrible chemistry teacher, your favorite food in the cafeteria, and things you did on the weekend, etc.
Remember that guys are people too, with (almost) the same concerns in life, treat them as you would any other person you meet, use an objective viewpoint.
Dont worry about it too much, as you meet more people and get introduced to friends it become easier to show your personality.