I posted on here a few weeks ago about being involved with a man at work who told me he was single but turned out he had a GF. Our fling lasted for several months and while it was only ever about sex I did like him. It turned out he cheats on her all the time and my post was about whether I should tell her. Anyway, I then found out he had got her a job where we work and while I don't work with her he has put us both in the position of coming face to face at some point. This was the final straw for me and rightly or wrongly I messaged her and told her. I did it from a friends account but I think she has found out who I am. I just can't get over how somebody can pretend to like you for months when in fact they couldn't have cared less. I have not heard from him since I told her and from his social media he is carrying on like nothing has happened. Her response was to ask me who I was, when it happened and why I was telling her now, she then blocked me but has since unblocked me. How do I stop obsessing over the fact that he seems to have got away with all this scott-free and is still living his best life while I am still upset. Sorry for the long post, just need some support right now.