I really like him, but he likes her.?

ive been trying to not like this guy for several months because hes a good person, but there are two things i HATE about him....hes a pothead and hes not a virgin, and we're freshmen. so i tried to just think of him as a friend, and recently i have admitted my feelings towards him. BUT he likes another girl. He just broke up with his old girlfriend because he liked this girl and she likes him too, but they arent going out yet. Well i used to think he like me, but kiind of ignored it because i didnt want to think of him that way, and its like he acts the same way as he used too, but i guess because i have admitted my feelings for him i guess ive been noticing the things that would lead to him not liking me, like not txting me bac, ive only just started txting him three times, cuz i JUST admitted my feeling a few days ago, so the first time he fell asleep on me after i txted him the second time he didnt txt me bac after he txted me and the third time i stopped txting him after i started to txt him. not like a bye gotta go when he stopped txting me either just no reply, but when i didnt reply it was the end of the conversation and i didnt want to drag it out anymore and him might thin kthat i was desperate to talk to him or something. But anyways i just really dont know what to do i really like him, i guess when i was trying to push my feelings aside i dint realize how strong they were but now they're out and they are just overwhelming i dont know....he live acrossthe street from me, ive known him my whole life, but now its just like i cant even talk to him without my heart racing and m words getting cought in my throat. i know about all that crap about being myself, but myself has know idea how to talk to boys that she likes, i feel like i have to compete with this other girl, im very competative, but i have know idea how to handle this situation, i dont even know what to do to get him to like me :/