Am I overreacting or is she playing me?

Me (28M) and this girl (24F) at the gym are sort of in a situationship idk? We joined the gym recently - she joined it about 1.5 months ago, and I joined it about 1 month ago. But I want to know if I'm overthinking some things. We spend considerable time together at the gym, we even work out together sometimes (our splits are different and I'm also a hybrid athlete). For instance, we both trained core together today, and tomorrow we're gonna train legs together. Even though she talks to other guys, I am the one who receives special attention and most of the talking time. And she doesn't train with anyone else either except for one other female friend of hers. Besides this, I've been reasonably open about my interest towards her but I should mention that I haven't asked her out yet (I don't do casual, I'm very picky about who I date, and I'm not even sure I want to date rn). And she's given me plenty of hints and signs (liking and responding to every other ig story of mine, especially if it's a picture of me) in addition to the irl stuff.

However, I recently found out that every guy that she's talked to in the gym, she follows all of them on ig FROM BOTH HER ACCOUNTS. Personal and private. She even likes their posts. It makes me jealous. But she grimaces every time I talk to another girl. And I've only ever talked to one other girl (a few times) who also happens to be the other hot girl at the gym. And whenever I'm in a section where there's another girl, she will either come and make a point of talking to me in front of her, or she'll just come and start training in the section herself or she'll secretly watch from a distance. Today the three of them were talking to me - the gym crush, her friend and the other hot girl (let's call her A), and her face soured every time I tried to talk to A.

But this feels weird to me man. She very clearly does not want me engaging with other girls, but she's quite bubbly with every other guy?? And the following guys from both her accounts; in my experience, a girl will follow you from her public account, but her private account is a special privilege. You're lucky if you end up there.

But there's also nuance to the "public" and "private" accounts in question here. She's not that active on her public account - it's just where she posts her fitness content. She's more active on her private account. But even still.

Am I reading way too much into this? Is it jealousy that's clouding my judgement? Please give me some advice :(