What is going on between us?

This guy i have gone to school with for 3 years decides to message me on facebook after barely talking. We played 20 questions about my past crush, who asked for a BJ (did not deliver) and other very personal things. I hadn't thought that he knew about what went on with my old crush, but then we started texting. He wants a handjob and to put his hand up my shirt. i don't even know if i like this guy. What should i do?