I love someone who loves someone else

I love some who loves someone else. he doesn't know I love him I actually just found out. I wish he did. he jut got a girlfriend about weeks ago. he likes her because she's pretty. (she is and I don't hate her) a lot of people in school like him because...

he's a guitarist in a band. (which got a record deal about 4-5 months ago) that's not why I love him. I love him for who he is. and I think its shallow they like him for that reason about the gguitarist in a band. he's very popular at school. and only dates popular people because the popular people don't let me get near him... when ever I see him I just wanna cry because I would protect him with my life and if anything happened 2 him I would never forgive myself. a lot of people say I'm crazy for saying this but I'm not. I want 2 tell him but I don't want him 2 thonk badly about me. (I'm thinking about inviting him 2 my b-day and his girlfriend because I want him 2 be happy if he's happy then I'm happy but I get depressed knowing he doesn't know I love him) what should I do please help

You leave him alone...

He has a girlfriend, so he's off-limits.

Your infatuation (bordering on obsession) with him isn't the same thing as love. Its making you turn a blind eye to who he really is. And it would be selfish and disrespectful for you to interfere with his current relationship, by professing feelings for him that you yourself don't fully understand.