Someone with experience please help me understand how my ex-girlfriend feels after dumping me!!?

i dated this girl for 2 and a half years and we were very happy together anvery much in love. we never fought about anything and our life was amazing. she was my first real girlfriend and i was her first real boyfriend. we started dating in december of our senior year in high school and she dumped me in april of our 2nd year in college. everything was going fine and it kind of came out of nowhere. she said she wanted to break up and we did for a week, then she said she couldnt be wihout me, so i took her back, then it happened again a week later and i took her back again (and this time we went out to dinner and she was telling me she was falling in love with me all over again) then we stayed together for another month and she broke it off for good. i was devastated because i never thought she would ever dump me because thats what she always told me and i thought we might be together forever. i gave her her space for a while and i was ok but after a while i began to try and text her or write her and she would say she was over it and moved on. but i cant understand how she could hav moved on in only a month or two. its been 7 almost 8 months now and i am still very heartbroken. i still see her around school and my group of friends occasionally, and a cpl weeks ago she showed up to a party i was at, and when she saw me she left and came back with some guy i know. there is no communication between us now and she blocked me on facebook and deleted my number. i have seen her facebook tho and her quotes are always about moving on or love or sumtin, and her pictures have also become very provacative. i realize that its over and shes moved on and i should too, but i dont understand how she could possibly not think about me ever and hav forgotten me or still hav feelings for me. i hear that she has been with several other guys i kno too. i think she gets off on the fact that i hav such a hard time with this and she feels empowered by it. but i decided to cut everything off and try to move on now. i am with another girl also but it is not the same and im still in love with my ex. she says she wants her space and whatever but i just dont understand if she really doesnt want me anymore or if i am still a thought in her mind. i need someone with experience (preferably a female who has been in this situation) to give me some insight on what might be going through her head now. please no stupid answers