My social life is in SHAMBLES :(?

i dont have many friends. 1 or 2 good ones. the rest think im weird and annoying. im so sad. the beginning of year 7 (6th grade) was really good. i had loads of friends, and they all liked me. now all them hate me, and i feel like self harming. i dont think im depressed, but i keep telling myself its all my fault. in the past year ive slowly been losing friends, without noticing, but now its really bad. i dont want to go to school. i have good school grades. im one of the best in my class at almost everything. theres nothing else to say. im a sad, antisocial female dog. i dunno if im allowed to say the word but i wont just in case