Want to lose weight

Now I think I getting fat and fat and my weight getting more and more too, I don't want to be like that. And when I was a little I was fat, all of my friends called me "fat boy", and I konw how a fat people feel. So, I don't want to be fat again. I asked one of my friend for a gym room address today, and I will to there tomorrom and join it. I think I getting fat because I didn't have enough exercise. However, I did a lot of exercise when I was in China, because I was in the basketball team in school, in that time I wasn't fat. But when I came here I didn't do a lot of exercise so I getting fat and fat. If I want to lose my weight I think exercise is the best way.....