Possible cheating, being left for someone else? Thoughts?

Hi everyone. I just wanted to get everyones thoughts on my ex relationship situation (both 26F) and how things went down. In the end, I was emotionally cheated on at the least and betrayed in a way I never would have expected. I know the only person who knows the truth is my ex but I just wanted to get everyone's thoughts on whether or not they think this was cheating, emotionally or physically (or both). It has been seven months since our breakup and although I have fully moved on from the person, I don't think I will ever get over what was done to me after being with someone for 8 years. I will try to keep it short.

My ex had been an actor for a good year before wanting to make her own film. She had done a film a few months before deciding she wanted to write/direct her own short and winded up becoming close with the guy who played her husband in that film. I didn't think anything of this friendship because at this time in our relationship, we both thought she was only into women, whereas I was openly bisexual. Anyways, I did not think anything of their growing closeness post-film. When the time came around where she started working on her own film, she told me off the get-go she wanted her brother in the film to be played by this guy because he would be perfect for it. (Mind you, she even told me its a story about siblings who also have incestuous vibes which is weird af anyways lol). I also put a lot of time, effort, and money into this project since I was also working in the film/entertainment industry. I did meet this guy in person and he completely brushed me off, both in person and over emails. He left me off of every mode of communication when it came to business stuff and only went through my exand my ex's best friend. A little while later, my ex started leaving me out of meetings and made her best friend do the things that were assigned as my job. When I brought this up, my ex got really mad. She then mentioned to me that she was planning for this guy to come stay at her apartment so they can work on 'method acting' together and be in character as their roles for an entire weekend together. She suggested a hotel to this guy but he insisted that he stayed at her apartment. Even though I was not living with her, she never asked me my thoughts on this.

A while later, she came to me and told me she was having a sexuality and identity crisis ever since she did that film with him where they played husband and wife. She did not bring him up or anything to do with him. We winded up having what I thought was a positive conversation about sexuality and she was asking me if I ever felt a need to leave/go be with a man, which I thought was strange. A couple weeks go by, I am on my way to her apartment, and she starts a fight with me over something as small as me taking a while to park. We go eat at a restaurant, I get my food, and she tells me we have to go home immediately because she has to tell me something urgent and she even said "I know you know whats wrong, just say it". I really had no idea what she was talking about.

We go to her apartment and she immediately breaks down and tells me she is having a sexuality and identity crisis triggered by this guy and that he is "ruining her life". She said she did not want to call off the film or him coming to stay at her apartment. I understand not wanting to call off the entire film but I thought it was insulting that she chose not to call off him coming to stay at her apartment, which was totally unnecessary. She told me not to be angry at him, that he did nothing wrong. She kept referring to our relationship in the past tense but refused to call it a break up.

The next day, she sent me a stream of texts as to why we shouldn't be together anymore, kept talking about her mental health and sexuality crisis. I kept asking her if this was a breakup, she refused to answer. When I finally called it a breakup, we didnt speak for 24 hours, and when I finally messaged her she blamed me for the breakup saying I was the one who said it not her.

From then on out, she essentially kicked me off the project, after dedicating time and money, and didn't even want me coming on set, which I thought was odd. She told me "nobody is going to be able to drive you". We finally spoke in person trying to figure out the logistics of what was going to happen since I considered an open relationship so she can explore (which was so stupid and desperate looking back). She refused this and told me we just shouldn't use labels moving forward. She told me over text the next day that she would not ghost me, she wasn't leaving, she still wanted me in her life, that she loves and cares for me. Well, two days later, the day the guy came to stay at her apartment for the weekend, she turned off her location and NEVER spoke to me again. Removed every trace of me from her instagram and started posting this guy.

Seven months later and I never heard from her again, I was completely ghosted and blindsided and forced to make closure on my own. She never even returned any of my belongings, including a $600 playstation console that I left at her apartment so we could play it together.

But anyways, what are your thoughts? I know this is most likely emotional cheating at best but do you think anything physical happened between them?