What can i do with my life ?

i dont see way out, of my problem, i have it all the time, no matter if i have money, or im in the nicest place on earth, and i dont know what to do, with my problem is that i lost my confidence in usa, i stop living in usa, i come from venezuela, but in usa i lost my life, and everywhere i go now i dont feel good, if im with my family i feel bad, if go with cousins i feel bad, if i go to school i feel bad, so i islolate myself all the time, im 18 years old and i being living 3 years in usa, i drop oout of school 2 years ago, im xtreamly shy, no confidence at all, i dont have friends, and i dont do anything in life .