Does he have a crush on me too?

There are two situations that would result in him finding out:

1. If you make it obvious enough (Show signs like smiling at him, talking/hanging around him a lot, flirt).

2. You have a gossipy friend that you told that you have a crush on the guy, and your gossipy friend told everyone.

If neither of these has happened, there is a very good chance that he does not know.