Anti-depressants?

I'm currently on prozac, which unfortunately added to my weight gain. I have tried different brands and have been on some form of anti-depressant for 5 years. I needed it long before that, but my parents were not very attentive in my teen years and told me how i felt was normal for a teenager.
Wellbutrin is a very good one, as it doesn't have the weight gain side-effect, it has actually cause weight loss in some. I couldn't take it because I get a very rare side effect of anxiety attacks. I stress that is a VERY rare side effect.
The person that will know best is your doctor. I just see my regular primary care doctor, because my depression issues aren't significant enough to be referred to a mental health clinic. My depression is more from low seritonin. My doctor said that I will be able to get off prozac in a couple years, once it's built up enough seritonin in my system. But it may be sooner now that I exercise more and am more active because that naturally boosts your levels. My goal is to be able to stop taking it by the end of the year.