Workplace harassment

I figured I’d write here to get some support.. So from late 2024 to mid 2025 (about 8 months) I now believe I was verbally sexually harassed at work from someone I considered a close coworker (friend I guess). I was engaged at this time, now happily married, and started becoming friends with a group of nurses at the ER I worked at. Insidiously, one of the males became increasingly inappropriate as the months went on. While he was sometimes inappropriate, he always seemed to show genuine concern for me, my husband, our upcoming wedding;m, etc. While I never reciprocated & tried my best to never say/do anything to give him any idea, I minimized every comment/text by laughing, responding in a sarcastic manner to keep my composure/keep it light hearted, etc. I ended up having a conversation with him explicitly stating that nothing was ever going to happen and I basically wanted him to stop doing what he was doing, to which he did. Shortly after I quit due to other reasons and we haven’t spoken since. I didn’t realize how much I was simply trying to survive until it recently came all crashing down on me. I don’t work there and have not for a while, but I suddenly realized one day how WRONG everything was, which turned into self hate. Why didn’t I stand up for myself & my fiancé? Did I allow this to happen? Did I enjoy the attention? Do other people think I was too nice/friendly to him? How can I be such close coworkers with someone that is inappropriate to me sometimes & makes me uncomfortable? Etc. Is this common? A sudden realization after you leave the environment? This is all so new to me and I don’t know if it’s truly PTSD, just anxiety; etc. All tips, education, information welcomed!