Yay! Motivation to lose weight!

My best friend just told me that she is engaged, so woohoo! I do not want to be fat for her wedding--I have until late summer (August or September) of next year to lose an estimated 70 pounds at least. It makes it so much easier to stick to a plan if I have a reason to, and since I'm maid of honor I really want to put my best foot forward, so to speak. No one else that would be in the wedding is overweight and Lord knows that's one way I don't want to stick out like a sore thumb. Who wants to be the fat girl?