Should I find a new therapist? I like mine but she thinks I have an eatting disorder now, I'm to fat to have that.

Not all eating disorder have to do with being fat. Some but not all.

1. Anorexia nervosa. 

2. Bulimia.

3. Emotional eating.

4. Overeating. 

Please do some research on eating disorders. As you know there are several reasons or eating disorders that may cause a weight gain.

Running away from the truth is certainly not going to help you. I suggest you stay for awhile, continue talking to make sure you don't have a problem with any eating disorder. 

I'm thinking you should do some research about eating disorders .. They don't just include weight loss (like anorexia for example)

Emotional eating (for example) is a disorder. There are a number of eating disorders that cause weight gain.

Two internet definitions for disorder:

medical : A physical or mental condition that is not normal or healthy.

A disturbance or derangement that affects the function of mind or body, such as an eating disorder or the abuse of a drug.

A lot of people wo are overweight have an eating disorder. And just because you say you are too fat, means nothing to us on the internet. There are plenty of people who are underweight and have an eating disorder who tell people they are fat.

Honestly, it sounds like you want to bail because she got a little too close to a nerve.