Help please need advice?

ok so me and my girlfriend broke up on 6/11/11 and we were dating since 4/20/11 and im in complete love with her i have been trying so hard to get her back but she keeps talking about some guy she likes so i was like whatever im just gonna move on so i got a new girlfriend and then my ex was like "wth you moved on ALREADY you know what now theres never gunna be a US ever again!! " so she calmed down and we became friends and i dumped the new girlfriend too. and then a few days later i got a message that said "You love Harley already, good to know. I know I told you I wasn't gonna be like this but I am. So forget me & forget what we had because it means NOTHING to me. And I'm moving on. Have fun with her. But just to let you know she ain't like me & I'm 10 times better. Oh and remember how I said we would get back together yeah well no. So byee!" what does that mean what did i do wrong? i dont like that OTHER girl i LIKE her