This is a difficult situation for you, I sympethise. At least part of the previous anser is sound - let this boy know that you like him. Eyye contact is a very good way of passing on your interest, and if he doesn't respspond, you've lost nothing in terms of personal dignity. Take your time, and if he is interested, he'll respond. If not, it's just not meant to be, which is hard to deal with, but you will find someone else to like. And no, you are not retarded! You are a sensitive person finding out about relationships, and it's not easy, but promise, it does get easier as you learn.