How to talk to a guy?

[Anita]

Okay so there is this guy that I think is really attractive. He's a Sophmore just like me but we havent had ANY classes together both this year & last year or in middle school. I really want to get to know him better but I dont know how to approach him? Oh & he just got out of a relationship 2 months ago soo.. He's really quiet & he seems serious & well he's mysterious & vain. I messaged him on Facebook saying hi but he never replied back so what do I do? I am friends with some of his friends but they arent really doing anything to help & I just want to talk to him myself. So can someone give me advice on what to do? & Dont say just go up & talk to him because I am very shy & I will not be able to do that. I would prefer a guy to answer this but 10 points for best answer(: