how can I suppress my appetite?

All of my teenage life I weighed between 100-120 pounds. I am now 24 and weigh around 220 and desperately want to lose 90 pounds. I've already lost about 20 some. A lot of my gained weight was due to medications I was on for a long time and once I stopped them I dropped some of the weight. A big problem I have is that I eat too much. Im afraid I could eat as healthy as could be but it wouldn't matter because I always feel hungry. WHAT can I do to stop this? I know a lot of it is self control but at the same time I have to eat a lot before I can finally feel full! can anyone give me any ideas or info PLEASE without being mean? Thank you in advance..