My ex’s new girlfriend is stalking me?

So my ex (not even an ex really, we just have a weird really long history of being friends w benefits but more than friends with benefits but less than dating... bc we live far apart but didn’t always... it’s complicated... I sort of burned things to the ground... his words... anyway, his new girlfriend is stalking me. Things ended really bad between me and him & I totally was crazy. (Not malicious), I’d never hurt anyone or even threaten it, but I was really in a bad spot mentally. Anyway, this girl looks at my Instagram stories every day multiple times a day, for months. From different accounts. I have literally blocked her from 3 desperate accounts. She uses her friends accounts to look at me... so I constantly have to block her, but she doesn’t stop... they were out of the country together and she was still looking at my shit every day, multiple times a day while
simultaneoisly bragging about how in love they are. She’s impersonated him and emailed me, at least 3 times... it’s just... I don’t get why she is so obsessed with me. I literally haven’t contacted him in months now. They’ve been together like 6 months... I don’t understand... y’all it’s like 3 times a day that she looks at my stuff. It’s madness. Obviously she’s seriously insecure, for who knows what reason, but why me... you know? I don’t get her fixation with me. I live across the country and this dude has many ex gfs close by him she could be worried about. I want to know if it’s all in her head or if there’s a reason she is that amped about me. Oh ps I live across the country from them. Literally the last time he an I talked was for over an hour when they were together, but it was half fighting. I just want to move on, but it also gives me false hope like that he obviously must feel something if she’s that keyed up. I don't know. I feel stupid even asking.
My ex’s new girlfriend is stalking me?
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