I agree with FAERIE ... EM ... sending some hugs your way too!
Believe it or not, many others do the same thing; eat too much and then try to rectify it by over-exercising or other means ... I did this one day last week and this week as well; but, I know that one day will not ruin the week, any more that one week ruins the month, or one month ruins an entire year. You would have to repeat this three and a half times just to gain one pound.
You sound like you have self-esteem issues as well. I have read many of your other posts, and you do have a life! You are a student with a nice boyfriend and a good family; and you have some good friends. Did you ever pursue your dream of acting, EMILY? Do you have any local theater or acting clubs that you could join and give some of your time and attention to while you develop your acting skills?
Have you ever considered doing some volunteer work? Now I know that you know why I am suggesting this ... cuz there is nothing else like helping others that helps us to heal! It fills in time, keeps us busy, helps others, and help us! It could be something that you love personally; like working with kids, the homeless, the poor and hungry (at a food bank), at a drama club or at an arts school, a nursing home or a hospice, and so on ...
Tomorrow will be better, and just keep up your regular exercising routine and that will help offset the mistakes. I also hope that in time, you will come to realize what a lovely, talented, and important person you are ...
You are here for a reason; you have a destiny; keep looking until you find it, Emily ...