Where is my life going and how can i make changes?!?

i am 22 and i really feel like i have hit rock bottom, i dont like nething anymore, i hate my job, the way things are at home withm y parents, my relationships not going great, i am not interested in the physical stuff and all i can think about is movin away n startin again, but the way things are and stuff with credit crunch and lack of jobs i darent leave my job, i have started a course so i can do social work but 2 weeks in i can feel the interest wearing off! i want to lose weight aswell but again i cant mind the motivation. please help!