Iam at the breaking point please reply i need advice ?

Am 19 and in college and I still live with my parents go ahead laugh it up and I have been stressed out with my math class and my parents are causing more stress on me saying u don't try hard enough u just ask and ask and am guilty last month I charged 300 dollars on points for movies on xbox live and without knowing I did the same this month so they are mad and my dad and mom are always putting me down I have down my homework and been studying and everything yet they say I don't think about my future and everything and I don't know how to drive yet jam afraid to drive so am gonna wait till I get over my driving nerves and then learn how and I don't have a job because no place is hiring where I live so am forced to live with my parents and am at the breaking point I feel depressed and stressed from my classes and depressed from my parents and I just don't know what to do am trying as hard as I can and they just nag me its getting old and they still treat me like a kid and I don't know what to do my birthday is almost here I am starting not to care about it cus so much stress I feel like just killing myself cus all this stress I don't know what to do please someone tell me what to do am thinking of just locking my self up in my room until my parents go to sleep and then coming out of my room once they are alseep and play xbox cus jam afraid to face them so should I just lock myself up in my room every time I get home until they go to sleep?