Speak to your parents about college - explain that you feel you are wasting time & resources. Go out there into the world and find a job or two, or join the military or National Guard while you figure out what you want to do. Once you have an actual goal, you can then plan how best to obtain your goal... it may involve more college or obtaining a certificate of some sort, or it may not.
Meanwhile, have your student loans placed in an income-based repayment plan. If you make a low salary, your payments would be low - but these plans do NOT prevent you from making additional payments to principle when you can. If you do not need a car, don't get one. If you cannot afford an apartment, either move back with the folks for a few months while you save some $$, or find a job that provides room & board - there are plenty out there (from cruise ships to oil rigs to fishing boats)