Do you think it's worth liking him? Do you think i have a chance with him? im 18 years old?

yes age is only a number... i dated someone 6 years older than me and it never crossed my mind what his age was. but this guy seems somewhat interested because he talks to you...however do you sit beside him or behind him? because if you are sitting close, its more a friend thing because he is gonna be sitting there for the term and saying hi is just showing that he is not treating you as invisible to him...like acknowledging your there. When he talks to you but then goes and talks with his friends, you aren't keeping his interest. Try talking back...like starting a conversation when he says hi to you first. That is gonna be a major way to see if he really wants to know who you are and may be interested. Don't stress about him, its only natural to be nervous when going into cl to see him, but your gonna have to wait to see what happens. Show your interest but don;t be creapy about it because that will scare him off and he probably won't talk to you anymore. So things that you can do...is show him you are more outgoing and confident while in cl, like maybe say hi to him casually or something and thats it...nothing else (if he is interested he will talk back to you), be social and contribute in cl. That may sound retarded, but showing that you are outgoing and voicing your opinion, he will notice you more and know your name