<human>: Hi,
I(16m)'ve known my best friend (18m) for 4 years now and our brothers know each other for 11 years now.
I know my crush(18f) for 4 years as well but she has been my crush for a year. Me my best friend and she are in the same class, well we are the class. Were with three in class.
I'm not the most social and handsome guy around. But my best friend is. They're both 2yrs older then me btw.
My friend and I both have a crush on her, but he only thinks of sex. I actually care about her.
So she has a boyfriend for 9 months now but my friend told me that he is secretly dating her for a week now, and that she's going to break up with her old boyfriend. From the moment he told me I wanted to cry, especially since he's my best friend. Idk but that makes everything worse.. He shows me pics of him kissing her and him spanking her and stuff. He let's me hear her saying she gets crazy about him, and that really hurts me. I don't know what to do, I feel really bad ever since and it gets worse whenever I see them. She doesn't know I know. I want to talk about it but I'm afraid he's gonna call me a wimp and that she would never want to hang out with me. I'm stuck, I don't know what to do. I only told one other friend about how I felt but he cared more about her current boyfriend. 
Please give me good advice, or tell personal experiences.

Condense the text into a few key points
<bot>: My best friend dates my crush and I've known them both for 4 years. I don't know what to do. Please give me advice.