So I (29M) have been dating my girlfriend (27F) for about a year. Things have been great overall, but recently she started acting really insecure about my ex (who I haven’t talked to in over 2 years). She would make passive-aggressive comments, scroll through old tagged photos, that sort of thing.

Then two nights ago, we were just chilling and having a glass of wine, when out of nowhere she admits something like:

“I actually used to watch your ex’s Insta every day. Like, for months. I even followed her on a burner. I just had to know what kind of girls you were into.”

I was totally stunned. She laughed like it was quirky and harmless. But honestly, I was creeped the hell out. Like—this isn’t “curious,” this is obsessive. I didn’t yell or freak out. I just told her straight up:

“That’s not okay. That crosses a serious boundary for me.” She started getting defensive, saying I was overreacting. I told her I needed space to think and asked her to leave. It was late—2AM—but I drove her home.

Now she’s telling our mutuals I “overreacted” and “abandoned her in the middle of the night” over something “harmless.” Some of our friends say it was extreme to kick her out like that.

AITA for asking her to leave after she admitted to stalking my ex?