What else can I do but move out?

I can honestly say that I know I’m too young to move out, but I don’t know of anything else that could help me. I think the best way for me to start out this is by telling you when I first started to fall, in the beggining of last year my dad had some financial problems, he asked me to lend him $2,000 and he would repay me, I knew he needed it but he never kept his word and I have not seen a penny since. My mom too had a financial problem she asked for $1,000 this went to pay off my sisters debit card debt which my dad forced upon her. My parents finnaly got some financial help from an outside source but I have yet to see anything. Later on this year I got a speeding ticket 45 on a 30, I can honestly say it was because I needed to pick up my sister and she was getting upset. Later last week I had an accident in her car, it wasn’t my fault, the car got totaled. Ever since I have not heard the end of how irresponsible I am, how careless I am. I want to yell at them but it really wouldn’t do any good. my sister is not only a liar, but she betrayed my trust. she has had a boyfriend for 3 years and through their relationship she ran up a $3,500 bill, she skips school on a regular basis to be with him, and shes too naive to know that if she continues this she will have this burden for the rest of my life. I go out of my way so my parents dont know about it my parents forbid them of seeing each other I honestly have done everything to help but it just seems that in the end I get nothing but the blame

some one please help me I know im not bad I recently got accepted to LeadAmerica, the Nationl Youth Forum of Medicine, and there’s more
I REALLY NEED HELP