I'm obese. is this an eating disorder?

Depends: There are many causes of obesity and it could represent an eating disorder or it could also represent genetics and underlying medical conditions as well.

Maybe or maybe not: Whether obesity is an eating disorder depends on whose definition one uses, and on what odd behaviors occur. A binge eater who eats huge amounts in an hour has an eating disorder. A chocolate addict who got obese on 3 lbs of chocolate a day has an eating disorder and an addiction problem. A person who got obese by eating a normal dessert 3 times a day for 20 years doesn't have an eating disorder.

Obese-disorder?: Usually, bulimics are just about average weight, maybe a little overweight.They are depressed because they have lost the normal control mechanisms of satiety (fullness) due to binge eating thousands of calories at a time, and then try to eliminate them by purging or excessive exercise. Anorexia is very different because the patient loses the feeling of satiety but have an euphoric sense of control.