Repost; someone please answer im desperate. help me figure out what went wrong?

before i start there probly wil b a lot of typos cuz im on my ipod nd this is really long but please help me :(. k well ive liked this guy since the summer before freshman year and wer sophomores now. i met him while he was dating my best friend and once they broke up we started talking more and we both started liking eachother (i know that was horrible of me since they just broke up i dont need any comments about that) so we liked eachother the whole summer nd beginning of freshman yr but couldnt go out cuz of my friend even tho she had moved. then he started going out with some girl he met thru myspace which hurt me but we kept talking like nothing had changed nd we txtd all the time. by the things we would say to eachother it was practically like we wer going out. then he was my chambelan for my quince and we had our moments where like i just wanted to kiss him haha but i respected that he had a gf then at my quince he told my uncle that he was my boyfriend and that he was "gonna take care of me" but then at my afterparty he kissed my bst friend his ex. later my other friend asked y he did it esprcially on my special night nd he said he felt bad nd he had no feelings for her nd he liked me. so we started txting more (it was summer so we ddnt see eachother much) wed stay up all night txting nd fall asleep on eachother the next day it was so cute we could hav conversations that lasted weeks but all this time he was still w/ his gf finally they broke up nd i thought it was finally my turn but noooooo now hes all supposedly bff with one of my friends but theyr always together nd he practically ignores me now. i really dont know what to do. i always feel like crying when i think of what we almost had. and i can't move on no matter how hard i try/: what do you think coulda gone wrong? did i do something wrong? or do guys just move on that easily?