<human>: Can you condense the text into three sentences or less?

So I've always been kind of chunky. Throughout high school I weighed 190-210lbs, all fat, not a bit of it muscle. 

My girlfriend and I have been dating for about a year now and I was 190lbs when we started dating. So in November I started eating much healthier and exercising and I've managed to lose 20lbs and put on a little muscle.

My girlfriend isn't the thinnest person in the world, but she certainly isn't fat. To be honest, she could stand to lose 15lbs, in my personal opinion. However I still love her the way she is right now.

So in recent weeks, she's been expressing displeasure with me going to the gym and not eating out with her late at night at places like Steak n Shake like we used to. I brushed it off and didn't think much of it.

Well, the other night she broke down crying saying that she didn't want me to work out because she was afraid I would leave her once I get fit and find her unattractive. I told her this isn't the case, and that I love her. But I said that if that's what she thinks, why doesn't she go to the gym with me and we can both get in shape together? Her family members are all teetering the line of obese, and their meals consist of carbs and fat, rarely any vegetables or healthy choices.

She took that as me saying I think she's fat, and proving her fears true.

She said she would try to eat healthier, but whenever we go out, she wants unhealthy food. We went to the mall last night and walked by the food court. She **begged** me to get ice cream and I said I didn't want any and that she probably shouldn't have any if she really wants to get fit and she got upset about that and got ice cream anyways.

How do I convince her that I'm not going to break up with her, and that I'm just tired of being fat and out of shape. Or help her want to become fit with me?
<bot>: I was fat. I am now losing weight. My girlfriend doesn't like that and is afraid I'll leave her, but refuses to make healthy choices herself.