<human>: So i met this girl 2 months ago and we've been talking ever since, mostly through facebook. We have everything in common, and she just seems like the perfect girl.
 
We've gone out a bunch of times but always with her friends , and I am kind of a shy guy, so I didn't want to kiss her in front of them, i was waiting for the right time for us to be alone, but never got the chance. 

She told me she liked me alot and I told her the same. She was the first girl who aproached me after my ex broke up a 2 year old relationship with me about 5 months ago. 

I grew to like this girl so very much, and yesterday at a party where we all got drunk, she kissed another guy who she had a month relationship with, about 4 months ago. He was trying to force her to kiss him and she was pushing him away cause she knew i was right behind them, but eventually she gave up and went outside with him and i followed, for a cigarrete and to check on them,  and she was grabbing him all over..

Needless to say I felt heart broken and left the party early, and as soon as I got home i deleted her from facebook as I was so upset. I lost my phone so theres no way for her to contact me, or vice-versa.

I feel like something has been ripped apart from me, as she seemed like the one who would finally get me over this break up, and because of her I got over it, but now I am heartbroken..

I was at school today finishing my last works and 2 of her girl friends were there. They said she cried later in the night, and I don't really know why, maybe it was because she regretted, but I'm not really sure, I didn't ask either..

I don't really know what to do, I feel helpless, what should i do?
Thank you so much for your help and sorry if my english is not that good, not my native language <3

Can you give me the gist of the text in a nutshell?
<bot>: Met this girl 2 months ago, really like her and thought she liked me but yesterday she kissed another guy at a party