my forever lifestyle change

In January of 2011, the highest weight I ever saw on the scale was 222 lb. I was devastated by this and began to change my lifestyle by eating healthy, drinking plenty of water and working out. At the beginning it was so hard, especially working out, but I pushed through it and lost my first 30 pounds. People noticed the change and the compliments got to my head and I got off track. I soon began to binge and purge, hoping it could take place of the strength you need to change your way of life. About a month ago I went to the doctor because of some concerns and the doctor could not tell me what was wrong. That was until she asked if I purge. I opened up to her about it and the look on her face, from a complete stranger, of the hurt and concern she had for me moved me. Since then, I have decided to get back on track and make a change the right way again. I have so many reasons for choosing this lifestyle and wanting the body I have always dreamed. In about eight months my life will completely change when I go away to school and I'm ready for a fresh start, with new people who will not know the old me. It's time to finally stick to what I have always wanted for permanent happiness. I know I deserve this and I will not let anything get in my way!
I am open to giving any advice no matter what it concerns. I do not want anyone to go through the health problems I have from an unhealthy weight loss so please ask me for any advice :)
Let's all get rid of our excess weight, not lose it because we do not want it back!