I hate my life!!!!!!?

i feel alone scared and depressed. ok i hate my life i dont get long with my dad. he is mean rude and abusive. i always get blamed for everything even if i was no where near w.e it was. my family has alot of problems like our family doesnt get along and stuff. i dont see my mom or my other famil bc of it. i feel like there better of without me anyway. bc my family doesnt get along with each other i feel like they hate me and my sis. we didnt even do anything. at school im so shy its like a disease. im growing apart from my friends and i feel very self consious and insecure. i feel like ppl at school hate and judge me bc of the way ilook. these ppl at school keep bothering me. they arent doing anything to me but i hear them talk about me and stuff. i feel so ugly . im so insecure about my features that i hate going out in public i feel like ppl will immediately hate me when they look at me.i also feel second best to my sister. everyone likes her more just bc she has blue eyes and light hair. even my family since we were ittle. i feel like there no point in doing anything bc ppl would like her better and prefer her. i dont let hr anywhere near my life bc i feel lke the ppl i know would prefer her.also when i see everyone at school i feel like a loser bc there so happy and stuff and im not. its like im the only one with issues. i get so upset when i see my friends takng to the ppl who talk about me bc i dont wantt them to hate me. i also feel like im not like everyone else like im werid. i overthink things to much, i worry about what other think of me so much that its all i think about. i am scared of everything. i dont let my self trustother bc i feel like they would betray me or leave me at the end. my marks are going down and im starting to get detentions and stuff. teachers are starting to think of me as a bad kid. i am scared to go to college and i dont even think i can since my marks are going down. there is so much i want to acomplish that i dont think i ever will. there is alot of stuff that i should have accomplished and done by now that i havent done. i feel like a nobody. there is so much more bothering me but i dont want to write anymore. anyone have any adivce. no mean comments btw