GIRLS I NEED HELP please?

Well I went out with this amazing beautiful girl for two year since eighth grade. We were so a close and cute we gave up friemds and people for us. Last october she left me tho. she broke up with me after a fight. Prior tto tht she kept telling me to change and said she hated me. She got really close to this girl but I was fine in the beggining because we were close. Then we didnt hang a lot and I hadnt seen her for three weeks then last secomd she bailed I got mad and yelled. After the break up we fought a lot and she hung with my bullies. She said it was amazing to be single. I heard bout it and called her a b I t ch she called me a stubborn ****. We havent talked since and she said shell show me what a real ***** is like. On new years I stayed home alone while her and her friend hooked with guys. What should I do. Should I try and talk to her or no oh and she still wears the school sweater I gave her and notes and etc. so any advice?