Need help into a girls strange behavior I once dated after I became “famous”?

Long story short: I met a girl at the gym and we dated for a while. It ended two years ago, but we had ups and downs over the next few years as I was rising in the film and TV industry.

A year ago, we stopped talking & I've become a celebrity at home, gaining recognition everywhere. My ex moved on and dated someone for 3 months, it didn’t work out. Seeing my name and presence everywhere started to affect her.

In April, my best friend told me she tried to talk to him about
life, but he suspected she was fishing for any information about me. In May, I saw her at the gym for the first time in months. She was wearing sunglasses, and when I waved at her casually while on the phone, she gave a quick, dismissive wave and left the gym three minutes later.

In June, her close friend began watching my Instagram stories again, and shortly after that, my ex blocked me on Facebook (even though we were never friends there). She had deactivated her Instagram after everything ended, but she didn’t reactivate it until later and then blocked me there as well. I still didn’t react.

Two months later, I saw her at the gym again. I smiled and waved to her, trying to keep it casual. She didn’t really respond, just raised her hand slowly. Meanwhile, my next film was being promoted everywhere, and she likely saw it through the gym's promotions.

A week ago, I found a water bottle at the gym and returned it to the receptionist, only to find out later it was hers. When she picked it up, she got flustered when she learned I had returned it. She told them we hadn’t spoken in months and blocked me so it’s odd that I’d return it. I sent her a casual text about the situation and mentioned a movie idea in relation to her canister we had once discussed that took off but didn’t pressure her for a response.

Two days ago, she saw me at the gym again but I was with the owner and didn’t notice her. Later, she came in the cardio room, saw me and then quickly left the gym. What is going on here?
Need help into a girls strange behavior I once dated after I became “famous”?
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