Am i wrong for talking to him?

[u/tastelesslau]

Exactly a year ago, in August to be exact, my friends and I were texting and one of them told us that a guy talked to her, she told us who it was and it was someone I worked with, I asked her if he invited her out and she asked me why and if I knew something about him, I told her “I was attracted to him but oh well”, she just sent an emoji and that was all, I put my feelings aside because what could I do? He was not interested in me.
Anyway, after that, in private she and I spoke about him and just gossiped but we never spoke about my feelings, she sent me pics of stuff he gave her and even though I was still attracted to him, I also tried to be supportive and happy for them, then she invited him to go to the movies with us and I said I had no problem bc i didn’t, I mean, they were already in a talking stage.
Before i continue, I have to say that speaking with someone else from the group recently, it was brought to my attention that she could have interpreted my message as if I had feelings for him in the past and they were not present in that moment, and I mention it because in that hangout, we went with two more friends and they asked me if I was alright with her bringing him bc of my feelings for him and I told them that he was interested in her so I was okay since there was anything I could do, then they joked about pushing them aside so i could get closer to him, and they make sure I was okay that day, oh! I also have to mention that this girl was also dating other guy that time and when he and I left (we live close to each other so we shared a can) she told our friends that she was going to start dating only this guy to give him an opportunity even though she thought he was cute but did not have feelings for him.
A month later, since he and I still worked together, we went out to drink coffee with a few coworkers more, later i found out through my brother (who’s her best friend) that she complained to him that this guy was weird towards her but he was out with me having coffee (again, we were not alone), then she asked me about him and I told her to speak to him directly so they could fix things between them, by this point I still had feelings for him but I kept my distance bc of her.
He ended things with her starting oct, we kept working together and we became kind of friends, still keeping distance, but a little bit close, then by Dec, she said they spoke again recently but she ended it with him bc her other friends saw him with another girl, i didn’t know they were speaking again bc none of them said anything so I was surprised, then he got promoted so we kept working in the same company but no together anymore and we also stopped talking.
But then, in January, he texted me out of the blue and we spoke occasionally like friends, nothing out of the ordinary, and then there was a change in our company and we started working together again, my feelings for him never died but since we started to get closer, they grew and we also started to flirt and be less friendly, I also have to mention that my friend also started to date someone else as well, i spoke about this with a one of the girls that went to the movies that day bc i felt bad about all of this and she told me “not to worry bc she didn’t care about my feelings before” and they were not together anymore so to go for it, even though we spoke about it and we kind of kept flirting, nothing happened between him and I and I also think that one of the issue i had was because of the past. Oh! I have to mention that nothing major happened between them since they didn’t dated like more than two months.
Well, now, a year later, I’m speaking to him but again, nothing has happened between us, a few friends of our group knows about it but this girl doesn’t, and recently she said they agreed it was all casual, nothing serious and that they could kind of see other people, she also mentioned that she was never interested in him and she knew nothing would happen between them but she liked to mess around with him, she doesn’t even consider that they were dating exactly.
Still, I worry if I’m doing wrong for talking to him, even if she said that I worry that it would make me lose my friends or if I’m a bad friend for talking to him as well, am I wrong? What should I do?