I am 13 and i want to lose weight before the summer is over??

i am a 13 year old boy and i want to lose weight when the summer is over.i weight 121 . i am 5.3 and i am not fat only my stomack is a little big and i want to lose that fat. i am doing a dite and i run every day at the morning and i do ab excersises and i drink 6-7 cups of water a day and i do push ups.and i want to lose weight befor the summer is over??is there some thing ales i can do???thank u for ur help