An issue with depression?

counselors seem to have nailed the idea of depression or the symptoms of it in me down to a science to diagnose me, but at what point does ones surroundings create the depression or is that even possible. Ive been "clinically depressed" my whole life...might there be something wrong with my surroundings and not me? I see people around me acting like their enjoying life but to me their not its more like a phi sod to alleviate stress. Is this true of you?