How can I lose anywhere between 25 and 52 pounds by Memorial Day?

I am 19 years old, weigh about 108 pounds (NOT a typo) am 61 inches tall. People always said go away fat woman to me before I graduated, these same people and others still send me messages on Facebook say things such as 'lose some weight fat woman, lose some weight, you look like an obese 50 year old woman', and 'lose about 40 pounds.' I drink 1 soda a week and on very special occasions, same with junk food. I never drink coffee, only have tea and I work out daily. Please help!