in response to "The guy I like, likes my best friend. It hurts me to see the way he looks at her and I truly care about him. What should I do? I'm to scared to tell him how I feel because i know he's going to reject me. Advice?"
Two answers are required for this situation
the first is one you give. If by "likes" you mean hes dating or has shown deep interest or affection for your best friend. You should probably leave it alone. No man is worth wrecking your friendship.
the second is this. If hes not dating your friend and you want to talk to this guy just do it. If hes single then hes free to see/talk to he wants.
the only thing you have to fear is the what ifs your going to create in your mind if you do nothing. I know its overused but "you only live once right"
tell him how you feel the worst case scenario is that he doesn't feel the same way, and that's OK. Because chances are your going to meet a lot of people in your life that don't share a mutual interest in what you think. But youll never know unless you have the faith to jump. :)