No, I wouldn't, not if he is seeing one of your "friends" to me that would not make you very good friends, or at least I would not think so but I guess we are all different, I feel what comes around, goes around, and he may not like you that well and how would that make you feel?
Good luck with whatever you decide to do!

I think its great when a person has enough courage to tell someone that they're into them, however in this situation I don't think you should. He's dating one of your friends, think about that. Isn't your friendship more important than some guy? And you don't even know if he likes you that way. If you said something and he didn't feel the same that would just make it uncomfortable between the two of you and your friend is going to pick up that something isn't right. He may even tell her and then what? Most guys make it clear if they are into a girl and you can usually tell the difference whether its just friends or something more and I don't mean to sound like a b*tch which is probably how i'm going to come off as but if he felt the same for you as you do him, wouldn't he be with you instead of your friend? It's up to you whatever you decide but i'd wait and see what happens. If things don't work out between him and your friend maybe then you could tell him. Good luck.

Boys come and go but friends are forever.

hehe,girls come and go and friends reamin long time.

Tell him girl, let him know how you feal..

so what?

I personaly feel you should be true to yourself. Tell the guy. Yes friends are friends forever if it is a true friend. She should understand. Maybe she doesn't even feel the same way about him. There is only one way to find out.

Don't tell him.It's meaningless. And that may damage your relationship

I think that you should talk to your friend first. See what she has to say about it. You have to be true to yourself, but respect your friend enough not to blind side her by it, who knows, she may just not be into him like you are and tell you to go for it :)