Search Results: girlfriend flirts with another guy

It's an old saying - a drunk man's words (/actions) are a sober man's thoughts. The same applies to gals, ladies. So I wanna give a scenario.

Imagine - guys & gals - you're at a pub. At the bar itself (or at a table, wherever you're alone).
You've had a few to drink - not enough to be hammered but enough to feel a buzz.
A guy (or gal) you know from college, community event, etc., whatever comes into the pub.
Sees you & because they recognize you decides to (or asks if they can) sit beside you.
You've always thought they were attractive but haven't had a chance to act on those thoughts.
You guys start chatting maybe another drink or two.
Ok.

How likely are you to flirt?
.
There are four situations

yes / no answers – you don’t have a boyfriend or girlfriend waiting at home or off at work
yes / no answers – you do have a girlfriend or boyfriend waiting at home or off at work

Do ***NOT*** think about these questions too much. Go off instinct/gut feeling. Which one is the most likely to happen?

One of my male coworkers and I had genuine feelings for each other but we never made any move because he had a girlfriend. I always kept distance out of respect for that girl. We admitted our feelings earlier this year but he gave me very confusing answer implying its difficult as he and his girlfriend have talked about marriage. I stepped back and avoided him. he realized he has hurt me. after 2-3 months, i noticed what seemed like he was texting on a dating app. I stayed quiet and away. i could tell he had started seeing another woman. In last 3-4 months, he started showing interest in me again. i didn't act as i thought he has a girlfriend.
recently, i got to know that he has bought his own apartment and his girlfriend has not moved in with him. also, he has asked two of my female coworkers if they know rich single woman. clearly he is single again but at work he has not openly come out as that. if i avoid him, he gets very interested in me and flirts with me. yesterday i gave him a box of chocolates for Christmas. he was very happy but after sometime, i heard him loudly mention his girlfriend to another female coworker. it seemed like he was wanting me to hear that (he has done this before too) - sort of pinching me and trying to give the false impression that he is still with her.
i felt so hurt. i really feel like telling him that i know what he is upto recently (he single again, seeing another woman and looking to get introduced to rich single women) and wish him good luck. should i do that or just stay quiet? lastly, i know from his behaviour that he still has feelings for me but is not pursuing me.