I posted about this situation a few weeks back. Long story short: after approx a year of flirting, I went on 4 quite long dates w/ a colleague just before lockdown. We got on really well & seemed to be on the same page about wanting something real. I was concerned he had recently broken up with someone but he emphatically told me he was over the relationship. After lockdown there was a week or so where we weren't in contact but I reached out & we continued speaking pretty much every day over 8 weeks. We eventually met up and it transpired he had invited his ex to spend lockdown with him & he had been shagging her the whole time. We left things on an awkward note but he told me it was meaningless & that I was the first person he'd met since since his divorce that he could see a future with & he wanted us to start again. I secretly hoped he would grovel and we could pick things up from where we left off but that did not happen; I've never heard from him again and I'm really, really upset about it.
I keep feeling anxious at the prospect of us going back the office & I've had the urge to reach out recently. Not to rekindle things as I've realised i deserve better but to tell him how he's hurt me and how upset I am. Ordinarily, I wouldn't bother but we work together and I know things will be awkward. Ideally I'd like us to be civil as we work in a small office and the tension will be obvious to everyone but I can't do that until I've had some answers or an apology at the very least. I also feel he shouldn't be allowed to get away with treating me this way.
Shall I say something or should I continue to leave it? Please no comments about why you shouldn't date colleagues, we were set up by a mutual friend and he came very highly recommended.