PARENTS DRAMA AND I NEED HELP QWIK BE FOR I DO SOMETHING STUPID!!!!!!!!!!!!!?

!!!!!!!my sister birthday came up and she had a sleep over and she got presents?and then when my birthday came up i didnt do nuthiong but go to sleep and wake up and my parents didnt eveion say happy birth day !!!!ive never had a birthday be for and im 14 now and ive didnt eveion do eney thing bad? my sister do alot of things bad and dont eveion get in trouble she is now 12 years old and she all ways had presents she goes to hydpark middle school and i go to swation he school is magnet and my school is not she make straghit Az in Bz and i make Cz and DZ im raising my grade up but the problm is my parents just payiong attion to her and its a big dill to me because every time i try to spend time with my mom or dad by my self she all ways bud in and now the focus us on her se whent to a really nasty web site wich is zoo tube.com on google with te space not pt to gether and she didnt eveion get in trouble/.? she do big things wrong and she dont get in trouble but if i do little ting wrong like brake a plate on axadent my dad gets mad??????they dont pay attion to me and one day i just couldnt take it eney more and tride to kill my self??? i cut my arm and tride to over dose and i couldnt take pills? and my sister tride to help me and i said NO and was prayiong for god to kill me????????and now they still dont pay attion and i did so mini goo dthings and she didnt????? do they hate me or em i a dissrace?my mom is really nice to me one day and is meen to me another day with out me doing eney thing?should i run away or should i just kill my self i cant take it eney more??????what should i do i tryed geion help??? didnt do eney thing tryed telliong my canserler at school didnt do eney thing but get me in trouble the canserler called my parents what should i do!!!!!!!!!!!!!!!!!!!!!HELP