Why did he do that ?? HELP !! gettin' No answers so plz help?

that guy was my lover in 2006 then we broke up but stayed as friends ..... last summer 2007 we met alot by accident and we were goin' to be gr8 friends but i realised that he has gave two of his friends my mail so when i saw him the next time and he came to say hi , i just walked away and didn't say hi back ... after 8 months i realised that maybe they knew my mail on MySpace or Hi5 so i felt sorry and added him again and apologized about what i did and he forgave me REALLY FAST and told me that they knew my e-mail from MySpace and we were begining to be friendz again but after only THREE DAYZ he was like what about gettin' back together as loverz so i accepted , we were doin' gr8 but i didn't see him since we got back together (( we got back by chattin' on msn )) and everytime we made a plan to go out he just canceles it so i didn't see him and tonight i saw him with his friendz at the mall (9 he's livin' next to me .. kinda )) and i swear he saw me 2 but guess what ??!