Getting It by Alex Sanchez
(I re-typed this straight from the cover)

It's embarrassing enough that Carlos Amoroso is fifteen and the only virgin among his friends, but he's never even really kissed a girl, The object of Carlos's desire, Roxy Rodriguez, is popular and hot--and has no idea the Carlos is alive. But watching a TV show one night gives Carlos an idea; What if he got a makeover from Sal, the guy at school everyone thinks is gay? Asking Sal to do him a favor is harder than it seems, because Carlos is worried that if any of his friends see him with Sal, they'll think he's gay too.
In return for making Carlos over, Sal wants help starting a Gay-Straight Alliance at their school--not exactly something Carlos is dying to do. In this humorous novel about first love, Lambda Award winner Alex Sanchez again brings honesty and insight to the trials of growing up.

(It'll make you really think about your life)