I really shouldn't quote you on the whole thing but goddamn every one of your words strikes home! I knew that deep down, aka gut feeling, but I guess I was just refusing to believe that I was just being used.
A little update, she texted me the night before and said that I shouldn't stop texting her, so the next day when the guy has arrived, I texted her asking how things are going. She gave me silent treatment (it says she read the texts) and I again texted her saying "I dont mean to come across as upset but it takes less than 10 seconds to send a text back, I feel disrespected when you ignore me like this."
That night, radio silent, they were probably drunk together and probably had sex, despite the fact she told me she wouldn't have sex with him before she left for the trip.
The next day at 11am, she texted me one simple text: "F*** off."
I was mad, still angry as of right now, and today because of that I went ahead and blocked her number, deleted her from all social media, and the only thing I have to deal with now is to deal with her by being grey rocking with her when she comes back because she and I work together.
Thank you for your time, saedrix, and to be frankly, I need that bluntness. The more harsh the better, I can always use a little push

P.S. I just started working out yesterday, went today too, and so far it's helping a lot. I also started to reconnect with friends that I have lost because I was heads in deep in that relationship, she wanted all my time at her leisure, when I express a need she rages.
Anyhow, it still hurts, like two steps forward and one step back. I hope I make it out safely. She has actually discussed interest in murdering. I thought she was joking, now I am no longer sure of that anymore...