Hey man, to echo what everyone has been saying I'd suggest just keep doing what you're doing. Definitely don't go to an extreme diet as that will slow your metabolism, just keep eating a healthy diet with maybe a few jogs in there and it'll come in time. Keep in mind you're probably going to hit/are in a growth spurt, so you're body wants that extra energy to make you grow. Odds are good you'll start shooting upwards, when I was 13 I was just a tad taller than you and around the same weight, but I grew into the weight fairly well through my first couple years of high school so don't worry about it too much. Patience is a hard thing to have, but this situation requires some. Keep up the exercise and diet and you'll see in a couple months you'll be in a lot better shape. Best of luck, man!