How to get rid of stretch marks w/o major products?!

Hi. I (like I hope many tall girls have-) am having a few problems with my side stretch marks. They're around my sides, on my hips. I'm a larger scaled 14 year old girl- and I'm recently starting a life renovation and my ultimate goal is to look good in a bikini by this summer. Now, I know that's impossible unless these things are gonee. I know of the tanning idea, and I'm willing to try it if need be. But I'd much rather try something else. I know of coco butter but I've tried that before and no luck. Are there any top-secret recipes for help out there that someone could bless me with?

-Renovating Marks.