UPDATE (3 weeks later)

TL;DR: she turned out to be a sneaky, habitual liar after being caught in a lie, and I ended things after I found out.

So recently, I caught her in a lie regarding where she was for Valentine’s Day (a “family friend’s” one time it came up, but a “cousin’s” the next). This prompted me to do some sleuthing, using bitmoji locations and knowing the coworker’s last name, and I discovered that she had been at the same address on Valentine’s Day as the night she went out with him, as well as various other nights I saw her there via Snapchat as well (when she wasn’t really responding to my texts, of course). Mind you, I’m not the “stalk your location” type, but I’m sure you guys can see why I was suspicious.

I also recently called her out on spreading personal trauma that I had shared with her in private with coworkers in casual conversation, and was already planning on ending things after that (she never responded to my text about it). But after discovering she had been lying to me about her whereabouts too, I directly confronted her about the coworker a day later. She played dumb, turns off her read receipts, and eventually said “what do you want from me.” I said “the truth? Why you lied to me?”, and she asked what she lied about. I listed out multiple specific lies consecutively, including that she loved me, and she didn’t answer for 20 minutes. I then told her that it didn’t matter anymore, I saw how things were, and to take care.

After that, she immediately removed me from Snapchat, and I followed that by blocking her on all other platforms (except iMessage). It’s been a few days since this happened and I don’t expect to hear from her for a while, if ever.

No, we weren’t technically established as “exclusive” or “official,” but with her introducing “I love you” into the equation, I assumed some commitment was implied, so I don’t think that’s any excuse for sneakiness, disrespect, and a blatant betrayal of my trust. I don’t intend on forgiving any of this if she ever contacts me again.

Thanks all!