College student needs weight loss buddy!!!

I am a college student just diagnosed with hypothyroidism (which at least explains why I can never seem to lose any weight even though I eat well and exercise a lot). My treatment's starting next week so I figured it was a perfect time to start a serious diet. I can't seem to self-motivate and would love anyone to be on my case!! Plus, I'm the maid of honor in my sister's wedding this spring and would love to lose weight for the wedding. HELP!!