Open Question: What is the best way to lose weight?

So i have been feeling rather unconfident lately, and i believe it is because of my weight. Im 16 and i am 5' 3, so know it may be normal, but i have never been to the point where i have been over weight. i feel like i have been gaining weight and i remember last year, i was alot skinnier than i am now. I had a flatter stomach and everything. I am usually athletic and i watch what i eat most