Lizzie breaking my heart

Im hurting, the girl i planned to ask to the year 11 prom, is going with another boy.
She decided to tell me at lunch time in school. With loads of people around, almostĀ  as soon as she told me, i burst in to tears and ran away to the bathroom, to cry some more. the boy she said yes to, was a sarcastic c-nt, he looks like a c-nt, sounds like a c-nt, i HATE him so much!!!
After i was done crying in the bathroom like a little p-ssy hole, I went to my next lesson, which was englsh, i hate my english lessons, cos there are just offensive tw-ts there. It was soooo exhausting, my english teacher, Mr Lucas read my email that i was sending to my best mate, Everyone kept asking "what was the email what was the email?" I just broke down again there, at the end of the lesson, i just ran out the school, as i couldnt take another lesson with people asking. I ran out crying
I ran to "that peaceful place" for those confused see "God and That Peaceful Place", had another cry there. I also cut my arms there quite a lot, but hardly any blood was coming out, i was very disapointed. But there was pain, im glad i felt that, as it was my punishment for not asking her sooner.
I walked back to school to talk to one of my best mates, he was very comforting, im very grateful for him, he said that shes not worth it, im starting to belive that now.
Later that day i went online to talk to her, and she wasnt in the least bit caring. I thought she was the most caring people i knew.
I love her so much, but she just decided to say yes to another boy. So instead she insisted on crushing my heart in to millions of peices
Ive completly lost hope in life now.