How do i handle this pain...? please help...im begging you..?

I'm 13 years old, and i don't want to go deeply into all the reasons why... but im majorley depressed, and i cut on my right arm from wrist to elbow.. i did it every day but i promised someone that i would stop, and even tho i havent cut for about 3 weeks... I'm constantly having thoughts about just wanting to end the pain and kill myself... I dont want hate on here about how im selfish and i know that people would care if i was gone... so nomatter how much ive wanted to and thought about it i would never go through with it... breifly ill explain some of the reasons... i live with my dad and moved out of my moms about a year and a half ago to live with him because of troubles with my mom... after i left i found out she was elloped and moved in with her new husband, and having grown up with my mom, its easy to talk to her..sometimes.. about some things.. and i really miss being with her. I have social anxiety so i have trouble making friends, plus after i moved everyone began to hate me... im not exagerating wen i say everyone because they all participated in a group online called everybody hates shannon (edited pictures of me as a devil and all...) So even tho i already have trouble making friends, im afraid of getting close to people because im terrified of getting hurt and i cant stop it nomatter how stupid it sounds...so i have about no friends...i hate my school and miss my mom so much, but i know that i cant move back with my mom because not only do me and her husband not get along at ALL, since she moved i would have to start my freshman year at a new school, starting all over again which i dont want to do... but heres the biggest reason. I've heard so many times "move on" and that im being stupid and need to forgot but i can't so dont be nasty, dont be hurtfull, and dont tell me im being stupid. Because i dont care if im 13 (fourteen tomorow.) and i am NOT "in love with the idea of being in love" beleive it or not, i am capable of loving, nomatter what my age.. anyone is. And ive been with maybe 5 or 6 people, never really feeling anything, but there was one guy.. ian... wen i moved here he was the only one to be nice and talk to me on my first day, and he walked me to my classes wen i got lost. over that year, over the summer, and 3 months into this year we became inseperable best friends.... then on october 18th, 2010, he asked me out... we spent all our time together, told eachother everything, i was slightly depressed from moving and he had been suicidal and depressed majorly since he was little... so we understood eachother, and we talked and helped eachother and since he was unstable, yes we would fight, we would have our bad days, but we helped eachother, we always loved eachother in the end. nomatter how big a fight, all we had to do to end it was take the other persons hand and squeeze it.. our sign for i love you. But once we had been together for about 5 months (yes, only 5 months, it doesnt stop the fact we loved eachother) things started to fall apart... he was getting more depressed, and so was i, but i had told the school about him, so he was getting help.. and i didnt know till after, everytime he went to therapy they tried to convince him to break up with me saying i was making him more depressed... and since he was getting more unstable he would snap at me more, causing me to get upset, depressed, and such... so i asked to take a break.. we'd still be together we would just act like only friends... we tried about 4 times, each only lasting until we saw eachother, we couldnt stay away, we were devastated that we were falling apart yet we had both been so hurt we couldnt stop it... and on March 5, 2011... he left me... walked out like every other person in my life ever has, and i thought.. i thought we could atleast be friends, could be civil.. or would realize we had made a mistake and taken eachother back right away, but none of that happened... he hated me, and the hate grew more and he loved me less everyday... he looked at me like he was disgusted, like he couldnt stand to look at me, and he walked past me in the hall like we had never met... not to mention the nasty texts i got in return wen saying something as simple as "hi how are you?" or telling him how sorry i was, that everything that happened with us was my fault entirely and not his, and even wen saying he was completly right i got nasty responses about how he hated me, and wished i had never been in his life, how the things he said about our future, the future we wanted, he never actually thought of, he never really wanted us to, or thought we would, last. But despite all the nasty things,like saying he didnt love me, i know deep down... he still cares. because he seems more depressed since he left. and wen he was little he was bullied so he likes to act tough, im not the only one he does it to.. but he's amazing... i dont know what to do about him... i love him