I can relate to this.. I'm sorry about your situation You seem to have mostly social problems, about making friends, ecc. what do you think of your social skills? Do you think they're good enough? I don't know if I'd call you depressed, but if you have this doubt you can try a diagnosis Still, at the moment, I'd focus on your feeling of loneliness.
I wish I had better advice, but that's all I can think of but I'm sure other people here will be able to help