Some back story:

Me and this girl were friends for a couple of years because of the same social circle. But I could always tell she had a thing for me. Time goes on and we start to hook up as she seen me at a low point in my life. Nothing too BP but seriously was a true low for me. Depression and stuff, that point in my life actually brought me here to this sub about two years ago. Since then i've taken the time to really take all this in and really see how it plays into reality. Over the last year, me and this girl actually have been consistently hooking up and the whole FWB thing. The sex is great nothing too much but the distance for school was a huge thing. Since when we were apart I hooked up with two grils and actually told her, in this time she was staying to herself and gave me more attention actually. She would take random trips to come visit me and give her self to me. On top of that, she would buy stuff for me and take me out once and a while to go eat with her when I was home. On Valentines day she got me an incredible rare pair of sneakers i actually love to death (proves what good dick can do tbh). The last time i've saw I told her that bing friends was more likely to be the only thing between us. She agreed and great we moved on and stayed friends. Yesterday I hit a low point just from business and my own issues and lost frame completely, like i cannot explain the garbage I said it really makes my stomach turn. Now after that she said distance was more likely gonna have to be the case. Even before this I felt a lot changed in her and how she's seen me. Moving on I get some texts from her that her and her family miss me a ton and can't wait for them to see me at a wedding I was invited to on their side of the family. Moving on to that night I have a friend of her's on snapchat and see this chick grinding on a dude and making out with him. I also have her imessage sharing her location which I just found out about a couple of weeks ago. She isn't home, actually she's in a part of the city I know what she's up to. Now it a took a single day for this girl to change her mind from telling me that "it's waterfalls when i masterbate to the image of you" to her getting fucked by some other dude. Goddamn I don't feel heart broken but it's just like wow, "i'm actually writing this" I feel like this would be someone else's story. I took a walk to just think it over and it's crazy how they can go from wanting to spend every minute with you to just getting fucked by some random dude. I don't know how to proceed though. Someone that i've known for so long can just ruin that trust you have for them and not even be honest about it. Thank you guys i'm actually really okay about this tbh almost expecting it.

BUT

I don't know to proceed honestly... Should I ghost her? I don't mind that I know I can. I need another opinion to be honest.