I need some advice...

I really like this boy. He's 18 and I'm 16. We're both in high school. He's a senior and I'm a junior. He took me to homecoming this year and I was so pleased! But that was in September. Now its December and our relationship has gone nowhere. There isn't even a relationship to go anywhere! So just as I was building the confidence I needed to tell him how I feel, I figured out that he has a crush on a girl, and that girl just so happens to be a close friend of mine. What do I do?!