Slept with a colleague- regret

[Notgood234]

I have had a one night stand with a work colleague . I didn’t really know him but we clicked when we were chatting at some work drinks . He said he had a girlfriend after . Now I feel very depressed and regretful . He regrets it too , but I have realised how empty I feel deep inside . He went back to his girlfriend and I have nobody . I’m a bit angry at him, he says he feels bad for her .
I have to face him at work. We have decided not to tell anyone.
I thought I was okay with causal sex( with someone single that it ), but clearly I am not.

I feel quite used and I do wonder if he has done this thing before ( cheated ).

Any advice as to how to get over this ? I don’t really want to see him again .

Was this recently? It will fade with time.

I think it helps to put into words what exactly is upsetting about it, either verbally by talking to a good friend or write a letter whether you ever post it or not. Then decide how this means you're going to do things differently in future. So the internal narrative becomes a constructive roadmap for making better wiser choices in that exactly what you do want is clear to you precisely because you disliked this. Maybe you are cross at him and yourself, maybe it's highlighted a distraction that you now can't ignore, acknowledge it all then you can park it and look forward.

Do you see him much at work? He is the one who has done something wrong so don’t feel bad. I can totally understand feeling used as it sounds like he did. If you have his number block him and if you see him pretend you don’t!