I'm getting a lot lazier and quite unfit. I do a lot of sports and I'm quite slim and used to be very fit, this year I have kinda slacked off a bit, I have gotten very lazy and very unfit also I have been eating a lot more, and I like it. I have gained about 6kg's and will probably keep getting bigger, I have a bigger belly now, bigger cheeks and my chin is getting bigger, should I just go with it, I do like eating and being lazy, should I just go with it?

P.s - I'm almost 15, I'm short and I'm really fussy with food so I eat lots of junk and carbs.