My friends ex keeps hitting on me?

They broke up about 6 months ago and he hasn't gotten over it since. She started flirting with me and 2 other guys the day after the breakup occured. For the first 2 months I just thanked her for her compliments and flirty remarks, even though I thought it was highly disrespectful being that she knew I was good friends with her ex, but I never told him what she was doing cause I didn't want to upset him. Due to her persistency in trying to get my attention with her overly revealing clothing and flirtatious comments, I decided to give in and play the same game back with her because she's so damn attractive, but with no intent on dating her or ever screwing her; just casual flirting given the chance. Anyway, one of the employees on the workforce took notice and went back and told my friend. Now he absolutely hates me. I don't know what to do because he's a huge whiner and blames me and not her.

My friends ex keeps hitting on me?
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