How can I deal with this crush?

I reallly like this guy, but he likes my friend. He tells me everything..(calling, texting, messaging)..that he's feeling and asks questions about his crush. I do all I can, giving him my best adivce and my true thoughts and opinions. But, everytime I talk to him, I get butterflies and I just want to go out with him, only I know he doesn't like me and that wouldn't be right. How can I deal with this crush..like get my mind off of him, even though he texts me alot and is in all my classes? How can I be sneaky and slip into a message that I like him. We're good friends and I don't want to ruin that if he doesn't like me back.How can I deal with this crush?
Go for it!!! If you want to give him a message saying that you like him start by talking about the one thing that you talk about the most and when you are in the middle of the conversation say his name and tell him that you like him like that. If he doesn't like you like that he may take a day or two for him to recover but that's all. But it sounds like he likes you!!! Good luck.