Just go for it and talk to him. You never know what you might find out.
I remember I had the hugest crush on a guy a year and a half ago, and I got so shy and nervous around him that he got the idea I hated him, and I he jus kinda stopped talking to me. I thought it was because he didnt like me, but it turned out he just thought I hated him.
So my best advice is dont even worry about what could happen if he isnt interested. You will get over it. But you will always regret it if you dont.