Help with a guy please? Does he like me?

I like this guy in Homeroom and he was in my cl last year and ever since I've pretended to hate him. But honestly, he's the cutest boy in my cl and I am dying to be with him. For about 3 weeks now my friend has been hanging out with him and acting like she really likes him, but she doesn't. I know this 'cause she's dating a different guy. My sister is the only one that knows I like him. I've told her (my friend) to start hanging out with me instead because we're really good friends and she's all like okay I am it's okay. But she always hangs out with him. She told me she really thinks he's nice. And because I don't want ANYONE to know that I was pretending to hate him, I told her that he's not nice. Her boyfriend is really nice and we're good friends but she's literally hanging out with my crush more than her boyfriend. Everyday I come home crying and bawling because of this. Today I was even more upset 'cause he asked her if her boyfriend liked her- I knew what that meant. He likes her. It crushed me and anytime I get upset at her for hanging out with him I lie and say that it's family issues. I can't do this anymore and the last thing I do is tell my mom I like him. She'll bust into my clroom and tell him. Please help me!! Should I tell him or tell my friend? Should I tell her boyfriend? I can't live like this anymore!!! Please help me. My sister already makes fun of me because of it. Should I forget him? I don't want to. I can't live without him. Thanks!! -Alexis