Dear thanks for the question.

Firstly I would like to tell you that you can reduce weight and can maintain it at desired levels. At this young age you should have confidence in your self. If I were your treating physician I would have advised you to reduce weight to come out of depression along with medications.

You need to control your diet
Avoid fatty foods like oil, butter , cheese
You need to be regular in physical activities and at this age you can do intensive exertion too but start with moderate exertion.

However one important cause of over weight is your medicines which you need to discuss with your treating doctor (you can request him to reduce dosage or change the tablet). But you can compensate medicine related obesity by physical activities.

I hope I have clarified your queries. I would love to answer subsequent queries. Kindly rate my reply. I wish you good health. Thank you.