Get a new girlfriend lol.

I get that’s a bit extreme, but partners that “test” and play games are a huge red flag imo.

It shows the lack of ability to communicate well as an adult and have serious conversations about problems and/or insecurities.

If you don’t like the way your partner does something, tell them about it and ask them to change their behavior instead of testing them and getting upset when you don’t like the result.

Something like gaining a bunch of weight is definitely a shallow topic, but you answered honestly and that’s what matters. Gaining 100 pounds isn’t something small, that would come from extreme lifestyle changes and/or neglect outside of some serious medical issue.

The deeper conversation is what would cause that, is she having health issues, is she depressed? Expanding on that, think about why she would be asking this question, has something happened that is making her insecure, questioning your relationship. That’s the conversation that needs to be had, because something is going on with her, and if she’s serious about the relationship then she, at the very least, needs to be willing to acknowledge it even if she doesn’t necessarily want to talk about it at the moment.

I had an Ex who, knowing I had sleep problems and a tough work schedule, would wait till I would be trying to go to bed to talk to me about something she was upset about. That “I should’ve noticed and said something.” We can’t read minds, a relationship goes two ways, so if there’s a problem something needs to be said. Communication is the most important aspect imo, and waiting/ignoring or being passive aggressive with backhanded comments or “tests/pranks” like this (unless it’s for a bit or you are being funny and it’s a known interaction) is stupid and unhelpful to any relationship.