<human>: Can you condense the text into a few key points?

Me and my co worker are bother in relationships.  Mine has been rocky for a while and I recently have started having feeling for my coworker.  For 3 weeks in a row now I have asked her to come out with me to parties. She has agreed every time and comes alone.  When we end up at the bar we are all over each other with dancing, groping and kissing.  Alcohol has been present everytime.  After one of the nights she came back to my place and we had sex.  Anyways I do like this girl and am going to end things with my girlfriend.  I don't want her to break it off with her boyfriend because of me nor.  Should i apologize to her for possibly causing damage to their relationship just because mine is near end? Or just leave it be?
<bot>: Me and Co-worker are in separate relationships.  Been "hooking up past 3 weeks".  Should i apologize for advancing on her just because my relationship is on the rocks?