Depression and Medication

Just looking for some hope here,

I just got on Prozac (first medication I've ever taken for anything) but I have this nagging feeling that my depression is coming from my surroundings and the people I put myself with. I don't want to be on medication, but I'm not going to stop until I know I'm better.

Is there a chance I can ever get off? I'm diagnosed with major depression, but I know it's coming from my life as is. I'm generally a hopeful person, and I see the good in just about everything.

I think I'm scared? I don't know,

Any help is appreciated.