Should I try

There’s a guy that’s always like looking at me and I look at him too. His friends tell me he likes me and I’ve told a few people I like him too. Only thing is that I don’t think we really know each other. I got my sister to message him in snapchat and he said he don’t know me (maybe he don’t know my name, honestly lots of ppl know it but they aren’t familiar with it, it’s hard to spell) we’re in classes together too ( legal studies and lunch) but I don’t know how to talk to him. He’s quiet also.