HELP!!!!!!!!!!!!!!! Should i just move on n forget about her?

i was going out with this girl n she really was in to me n the beginning and then things just went bad. She said she wanted to slow down and she stopped caring about our relationship in my opinion. She didn't call me as much and when i called her to talk to her we would talk for a short amount of time n she would say she would call me back and she never did. Sometimes she acts like she could care less about us and then sometimes she shows me signs that she still cares. She called me up and asked me to go to the movies with her but then she ended up flaken on me.So she really was pissing me off,confusing me and breaking my heart at the same time. So i just said F$#! it and i stopped calling without saying anything. For about 2 months i did not talk to her at all but i still missed her. I felt like the relationship was just unhealthy and i needed to just move on even though i still had feelings for her. I heard from people that some other guy was trying to get at her n they had started going out so i really thought it was over and i have to admit it hurt bad. But not that long after i found out about this some friends of mine called me because they wanted to hang out and when i got to the hang out spot she was there. I was shocked she ran to me and gave me a big hug. The whole time i was just actin natural n jus kind of showing no emotion but when i looked at her she would give me this crazy stare sometimes i don't know why. But when it was all over i heard from my friends she was kind of mad at because i kind of just ignored her and acted like we were never close. So know im just lost i thought this new guy took over but i heard he is mean to her so now i don't know what to do. I think she still likes me but i don't know if its worth risking my heart again but i do love her.