How to loose weight fast?

I love to eat but I hate gaining weight.. I also love running but it's really hot out so I can't go running with out getting heatstroke or something :/ is there anything I can do to loose weight fast? I'll do ANYTHING! Well except starving myself or get a gym member ship cause my mom won't let me.. So... yeah what can I do?! Please I'm desperate... I'm 13, I have thunder thighs (every one in my family has them) I have huge love handles and that little pooch under my belly button... I don't know what to do anything I've tried, doesn't work... please help :(