dude don't worry a bit. Most of us go through this because back home we are always with people who understand us, always enjoying life. When you are in a different place with different people your mind triggers you to be different. Its ok you will get through this, you must be thinking life is kinda fkd up and i have nothing to do. Maybe bad job , bad studies etc , you might come across suicidal thoughts too. But hey its gonna be all ok. Trust yourself and alwys have faith in god. Before doing anything to yourself think of yr family and loved ones, all of us cannot be bill gates or the president their are people who live with very little. Look in africa dude. You will be fine and you are fine. life is too long and good thing will come by. All this will sound stupid as hell but college degrees, money and shit dont matter as much as we think of it. The most important thing is family. 

Be strong ni**** you are the fking man dude, i know its freaking so hard bro but just have confidence you ll turn out to be just fine

There is a medicine called Relicalm, seek doctors advice though. I do have the medicine if you wanna give it a try for a week. this is not a drug, if you find any change in a week you can order it from back home. Let me know what you think.