<human>: This is my second year of college and my girlfriend's first. We were both runners in high school and took pride in being very fit. Now, I'll be the first to tell you I am not in as good a shape as I was in high school. I have probably gained ~10 lbs over the past year and a half just from not running as much and from completing puberty. My girlfriend on the other hand, has gained ~20 lbs in the past 3 months.

Like me, she does not exercise as much as she should. However unlike me, she eats fast food basically everyday, sometimes multiple times a day. She has been having a hard time with her family and with adjusting to school recently, as she suffers from anxiety and depression. I imagine this is definitely a contributing factor, which makes me feel worse about how her changes are making me feel.

I have definitely become less attracted to her as of late and our sex life has suffered for it. I sometimes feel downright disgusted when she talks about wanting to get fast food or when I see her eating it when I know she already has that very day. I know these feelings aren't rational or good of me to have. We have been dating for roughly a year on and off and I should be able to look past this, but I can't. I don't want to be with someone who doesn't make taking care of themselves to any degree a priority.

I know this is a pretty cliche relationship question, but I am genuinely wondering if there is any way to bring this issue up. I see the road she is heading down and it isn't pretty. I know that if she could just make some minor changes to her lifestyle right now, she could nip this problem in the bud, but I am afraid bringing this up might make her upset and make her fall into this deeper. Does anyone have any experience with this or ideas?

Can you provide a brief overview of the text?
<bot>: My girlfriend has adopted a very unhealthy lifestyle since entering college and I am not happy about it. Does a tactful way to start a conversation about it exist?