Ugh plain celery is booo-ring
Whatever your fave salad dressing, chances are there's a low-fat or fat free version.
My ex BF was 260 when he was a junior in high school... after graduation he grew 4 more inches and when I met him he was 6'4 and 215... he says he lost all the weight in one summer when he just got sick of being pudgy and started jogging.
I had another good idea!
Why don't you find a summer job that keeps you active?
For example:
Landscaping- landscapers hire in Feb/March
Farm labor- hey, you can get kicked out of my county if you graduate high school without having spent at least one summer picking fucking cucumbers! I've done it, so has everyone I know, girlies included!!!
I'm sure you can think of some job that keeps you moving all summer.
Oh! Work for a moving company schlepping other peoples crap?