How can i loose weight fast?

i am 18 years old i am very insecure about my weight it gets to the point were i start bursting in tears. i been drinking water and cuting out all of the snacks i started doing this baout 2 days ago also i been having light things for lunch such as soup and water. i have a light dinner and i been working out at home on my excersize ball. i want to know if this will work i really want to loose at least 80 pounds ikno it is not going to happen right away but i really want to better myself im tired of feeling insecure :( can someone please make any suggestions of what else i can do to help me loose weight?