His Girlfriend is Unattractive to Him Because She’s Gained Weight. What Should He Do?

This is an increasingly common problem:

How do I tell my girlfriend she is unattractive to me because she’s gained weight?

We’ve been together nearly 7 years. Over that time her weight has creeped slowly up to the point where last year it just seemed to hit a threshold with me where I don’t find her attractive sexually anymore. I’m even finding it embarrassing to be seen with her.

Now she’s not exactly obese. She’s on the lower end of ‘technically overweight’. I‘m attracted to the 2014 her, not 2020 her. That was my type I guess.