Do I have an eating disorder?

About a year ago I decided I wanted to lose weight. My motivation was when I found out my "friend" told everyone who I like, and the guy knew, and he had a girlfriend. I felt so fat and ashamed of myself I started starving myself. I lived on about 300 calories for 2 weeks, started binge eating, and the cycle started again. I ate healthily for a few months, and then went back again. I have since then lost a bit of weight, but it goes about 5 kgs either way. Do I have an eating disorder?