Floating Around
My ex and I broke up about 4 months ago after dating for 4 years. I tried during the breakup to find a compromise to keep us together and then broke no contact about 2 months ago and reached out again to see if we could have a conversation. She was receptive to to having/hearing the conversation, but after communicating how I felt and the mistakes I made she just sat their and accepted no responsibility and doubled down on everything being my fault; I was also accused of stealing a designer purse I gave her which is infuriating when you factor in that I gave her $3K after our breakup to help her get settled. I'm far from perfect, but I'm definitely not a thief! Less than ideal interaction, but it gave me the closure I needed.
Since then, I've been focused on work and taking care of myself; have lost 30 pounds since the breakup and on the path to getting in much better shape. What is preventing me from completely moving on is, my ex has been staying with her female friend every other weekend; this person ironically happens to live in the condo right across the hall from me. While we were together and despite the proximity, my ex would rarely if ever spend time with her "friend", maybe once a month if I was traveling they'd grab dinner, now she's over there having sleepovers 2 weekends a month. She's also reached out to my brothers girlfriend and informed her she is moving into the apartment complex directly next to my condo this Summer. My ex has de-activated her Instagram, which is probably a good move since she spent 10+ hours a day glued to her phone, but kept her FB. All she posts on her FB are AI generated images showing her at fancy/fake restaurants.
I'm about 80% moved on, but the random weekend proximity makes it difficult to not think about the past and the current situation. Combine that with the fact she's planning to move 50 feet away and it makes the situation even less ideal. I'd like to think there are logical explanations for all these occurrences, but I find it hard not to get annoyed with the situation. Am I just overthinking this?