Boy problems! i need good advice honest too?

ok soo...my ex and i broke up on Dec. 20 {dated for a week and 6 days} and umm...i still like him. i broke up with him kas i heard dat he didnt like me at all and he only went out with me 4 pity. He said i was too shy, im not shy at all. the only thing that stopped me from talking to him, was dat it made me feel awkward dat i was going out w/ sum1 hu didnt like me. but at some points it seemed like he really did have feelings for me and at some points it didnt. so idk. and today on AIM {instant messaging system} he said "wutsup" and i said "notin"...and den out of no where he said he likes a girl, and he flirts with her but it sux kas she has a man. and i felt soo shitty. since we broke up we didnt talk on AIM at all, and he spontaneously IM'ed me and i thought he liked me again...and when i got dat IM i was like "ughhh ***..." lol i was mad nd sad. i mean eavryone deserves a second chance. What should i do in this case..? I need tips, advice, how to get him 2 like me not her? honesty!