Want to leave flat but what will happen ?

well, i moved out my parents home about two month ago and into my own flat, i went through a housing agency and signed a tenancy agreement of 6 months. my parents paid deposit ect. and give me �1000 to cover it all. however now being here 2 month i have realized i am depressed and cant deal with paying the rent and all the bills, i cant afford it!, so now i want to go home. i am just wondering what would be the outcomes if i did ? and what do i do to go home ? do i have to pay for things ect?? thanks :)