So I've been liking this guy for quite some time now. But there is a problem, and I don't know what to do, He's one of those funny dangerous kinds and by that I mean that he is really funny, always smiling, always has me smiling and laughing, when he is hurt, there is something in me that tells me I'm hurt too. He is in a gang, but I want to help him, because I know in the end it will all be worth it, but most of my friends like him too, but I like him A LOT and this girl, she has like a super huge crush on him, he's like definitely top 10 in my school. Oh did I forget to mention he has a girlfriend, I honestly don't know what to do, should I tell him?