Go to a dumb looking gang-banger, kick him in the testicles (multiple times if needed), steal his gun, go to school, go the boy you like, point the game at him and ask him to date you (boys like guns or at least i do) if he refuses, shoot him, then shoot yourself, deadpool style.
That's exactly what i'd do, being a lonely nerd who likes to use russian sniper rifles to bang people's head in codmw2 and be and @$$hole to everyone, who reads deadpool comics daily.
If you want the truth, as a fellow male human (i'm 89% positive i'm) if you like him that much, just your continuess approach will make him notice, keeping your calm is also important, the best way to do that is to be with a friend of yours, if in a large group, or simply try to greet/help/ask/advice/kill/meet/call/chat/shoot/envite (et cetera et cetera) him more often, for now, you should seek a normal friendship, these things are done patiently, since confessing now would be a bad idea.
If you keep getting close to him, you'll get used to him, that's pretty normal for every living creature, even babies wont cry after seeing a person multiple times.
Hope i helped solving that puzzle of yours or ruining your mental state.