What's your peak Body Weight?

I dont even know how much i weigh right now. but i know it had to be about 220 Its horrible. I mean i have always been a bigger girl.... but not THIS big. and i can't seem to get on a 'diet' or anything, i always fall through with it. So therefore if anyone has any GOOD like REALLY GOOD ideas on how to loose weight, that would be wonderful. I would really like to loose about 100 pounds by summer..... a little less if fine, but ANYTHING would be the best!

I am 255 pounds right now. This is the only peak weight I want to ever have. I want to get down to 137. I want to lose 94 pounds of this weight by April 2009. I think with determination and a strict plan carried out I should be about to.