A colleague of mine who I had not spoken to much asked me for a drink a few weeks ago- it was a nice evening and I was enjoying the attention given I had just (after a long time) got over my previous relationship which had left heartbroken. He asked if he could come back to my hotel room to use the loo to which he then tried it on with me - one thing led to another and we fooled around a bit. I have since found out he is in a relationship to someone who is very religious and so their relationship is not physical which explains his persistence that eve. He has completely ignored me since which has left me angry at myself for letting this happen. I'm not longing for him as he is clearly an unpleasant person for doing that to his girlfriend, however I feel low about it all and upset that it's now very awkward at work which is affecting my work. Any advice on how to shake this low feeling?