If your friend told him that you liked him, then you're not going to be able to go up to him like everything's the same. I hate to say it, but it's all or nothing at this point.
Ask him out... guys like it when a girl takes initiative. Or maybe ask one of his friends to go out with one of your friends, so you can go double & take some pressure off. Anyway, like i said it's all or nothing now. Just go for it! Good luck.
"Stay positive and love your life..." -Nick Hexum, 311