18 and LOOKING FOR PEOPLE TO HELP ME GET THIS WEIGHT OFF!!!

I am currently 20 pounds over weight and though it may not sound like a dramatic amount, i have been struggling with my weight for almost 4 years and just can't get the weight off! I have tried so much and just lose hope when i don't see fast results! I need help and motivation to reach my goal, i want to be confident in my body and finally drop these nagging 20 pounds! PLEASE HELP :)