I want him to ask me out....again. What do I do?

I was dating this kid a few months ago.. we broke up after only one week because we never hung out outside of school… I still like him. I tried to get him to notice me more, i told my big mouthed friends I still like him (I guess they finally decided to keep a secret…just my luck.) and I try, and try to talk to him. but nothing works. I get too nervous. What else can I do to get him back? he never talks to me anymore. and we only have one class together. HELP!