<human>: Give me the gist of the text in a nutshell

I go to my girlfriends house 1-3 times a week just to generally hang out and sleep the night. I'd say my girlfriend isn't at all fat, she's a little chubby but that's fine. One problem I've noticed is that she eats and drinks all the time. Nearly every time I see her she'll be eating or drinking something. I don't have the biggest problem with this but I know that it cannot be good for someone. I'm not super man but I have been looking after my body as of recent and because of this I only eat at breakfast, lunch and dinner with fruit or something in between. She asks maybe every half an hour if I'm hungry or thirsty to probably 90% of the time I'll say "no". She's recently been getting upset with me saying "Why don't you ever eat or drink at my place!?". Today I asked if she wanted to hang out in the city and we could go back to hers afterwards to which she replied "I don't want you to come back to mine because you never eat and I don't want you to starve". Which kind of hurt to hear. I have never felt hungry or thirsty at her place at all. I've tried mentioning this to her but it just does not seem to be going through her head. I don't want to bring up the fact that her eating every second could be unhealthy due to the risk of her getting defensive over it.

What are some things that I could say to her to let her know my thoughts and feelings without getting her in a defensive of upset mood?
<bot>: Girlfriend gets very upset with me when I say "no" to food/drinks she offers. I'm trying to get in better shape. She asks every 30 minutes and is getting upset over it. What do?