Good for you on 3 years! I was only throwing up after meals for a few weeks, because thankfully my mother caught me and talked me down and got me help, but man those urges still are a problem. My biggest reason is honestly my teeth I've always had nice teeth and had just finished with braces... kind of self-absorbed but hey whatever.
2) Embarrassment. People were always talking about the girl at my school who was very obvious about her bullimia... and not in a nice way. I didn't want to be her, I didn't need her problems as well as my own (again, kind of phrased badly, but in essence I hope you know what I mean).
3) I want to love my body. I want to enjoy reasonable amounts of food. I want it so badly I will fight even myself to get there. And often that's the hardest thing for me to here, that I'm an obstacle in the way. I'd so much rather be a girl who could eat anything, but I'm not, and I'm starting to learn to love my body for that. I have the choice to curve out or become skinny. Sure, doing it healthily is hard and time-consuming. But some girls really can't ever gain those curves girls like me hate so much.
4) Whenever I find myself leaning over a toilet praying to forget after I've relapsed just this one time. Just one more time, I ask myself what I'd say if my best friend were in front of the toilet instead of me. Sometimes I break down crying when I force myself to think that. I'll just lay there and cry, but I'll feel stronger for it in an hour.
5) Think of how good you'll feel tomorrow for having lasted a whole nother day of recovery. Be proud of every hour you take care of your lovely body, you're worth it. Love yourself <3