How can I lose about anywhere from 45 to 55 pounds by Memorial Day?

I am 19 years old, am 61 inches tall, weigh between 107 and 110 pounds (NOT a typo). Before I graduated from high school, people always called me a fatty, a fat woman, obese woman, said 'go away fatty, go away fat woman, go away obese woman, lose some weight, like 50 pounds fat woman' to name a few. These people are always sending me messages like this on Facebook, even though I am not friends with them. My stomach has quite a bit of fat, so do my thighs. Can someone PLEASE tell me how I can lose this much weight or at least look more toned so these people will leave me alone and so I can look good in bikinis? I drink 1 or 2 sodas a week, drink tea daily, eat healthy and work out daily, including when I am watching television, but nothing is working. Help please!