Thank you everyone for taking the time to reply.
Well I back out and didn't contact her.Now It's clear to me that she's ignoring me because she's back in town , and is very active in the forum we met,tweeting but still didn't contact me.
I didn't wanna go to the thread because I wanted to avoid her and tension but then I had to ask something ,even though she posted on the same page,I also did but ignored her message and got my replies from others.

Yes this is the first time It's happening to me but I got my lesson.I don't know what happened and maybe I'll never know but I choose to accept that the friendship has run its course.
It sucks because we really were close,had similar outlooks and views and had so much fun joking,being crazy and we live in the same city and planned to meet and everything before this but oh well it is what it is.
Last time we talked ,it was fine.So I don't understand and this is not the case of "people grow apart" because It was just brutal.She was always cool but maybe she thought I was being too much in her life or something but then we both played a part in it.It definitely wasn't one-sided.
I'm gonna take the higher road and learn my lesson.
I made my decision;definitely backing out but seeing the tweets and the posts in the forum bother me a bit but I guess I'll get used to it.I hate creating drama :reason why I havent emailed her to ask or unfollowed her.