What Should I do about my lost friend?

Well heres a bummer of a story. There was this friend that I had who was always acting like there was either something up her rear end or was hyper as can be. She was a totally awesome friend and all that but she would always find a way to bring me down whenever I had great news to share. Any who, I never really minded it since she always made up for it by being nice and etc. Although last week she got on my case about MY sanity. To me it was as if she was trying to call me crazy in a literal way. I am not crazy at all, nor do I have a problem. Which she used against me by adding that I wont accept that I have a problem. I have asked other people I know and they say that I have no problem. Sure I'm quiet and shy, but who isnt? anyway, I got pissed off at her because she said that I had no self respect and wanted a SPECIFIC reason as to why I didnt care if I did or not. Truth be told, I dont really care who respects me as long as me and that person can get along in talking terms at least. She saw that as some issue and began questioning me as to what word defined me and I said honor and she couldn't see it. All the people I have ever worked for have told me that I was an honor for my presence to be here and there and that I'm very much a good person at heart and after all the stuff I have done for her over the past couple of months(Which include always being available to her, lending her things, keeping her company, and even be sentimental with her and pionate when her uncle was in the hospital.) How can a person not see me as dependable and honorable? any who, at this point I was pissed so I just got up and said I'm not the one with a problem, you are. I then took off and didnt hear from her until a day or two later. She owed me some cash and wanted to pay me back but the thing is that I didnt want her to pay me, I just wanted her to leave me be, but no she had to be stubborn and press the matter of paying me back which she did and we got into another arguement where she just went ballistic with calling me a coward, and yet again calling me crazy by saying that I keep denying that I have a serious problem. Get this, she's not even my girlfriend and she had been expecting me to change my ways from being an introvert to an extrovert in a matter of months which I cannot do since being the silent type us what I do! Sure I'm more talkable now, but thats beside the point. The thing is that she tried to change me into someone that I wasnt and I didnt realize that until now. I am pissed, but I cant help but to feel an emptyness in my heart. Sure she was only a friend, but its just being hard for me to forget her. I felt quite a lot for her and she didnt feel a thing for me. And yes I do know this to be true since we spoke about it before. So the real question that I have is this, how on earth can I forget about her? This emptyness is just tearing me to peices....or if not, then should I try to be friends with her again?