Cliche: I was rejected by crush, need love advices :<

I can't suggest anything to read regarding this but the only thing i can recommend is to understand the cliché meaning behind "There's plenty of fish in the sea". In the moment, its going to seem like they are the BEST person to be with, and you fall in love with their personality and who they are. However, this will happen a lot throughout your life. Even if you DO successfully start dating a girl, chances are it isn't going to work out in the long-run. Once you recognize that, you'll feel much better about your love life.