One of my coworkers is always teasing me and flirting.I thought it was cute and the more shifts I worked with him the more I liked him. We talked about a lot of things like parties, roommates, other coworkers, and so on. I recently found out that he is dating one of my coworkers and I am still in shock. I just don't understand why he never mentioned he had a girlfriend especially since he knows I know her (I've mentioned her before to him). I felt kind of hurt but then I convinced myself that I was just over thinking and he never liked me. This weekend a few of us were hanging out and drinking He was there and he was very flirty and trying to get me to drink more. I was supposed to call my friend to wake her up at 5 am the next day but I said I wouldn't wake up so I asked him to do it. He said "give me your #, i'll call you and you call her", at the time I thought it made perfect sense but now I'm thinking he just wanted my #. Any way he has texted me three days in a row. Most of his texts sound pretty flirty to me but I don't know anyway the point is I don't know if he is thinking he can cheat on his girlfriend with me or something? I'm confused I thought he was a nice guy but him not mentioning his girlfriend makes it seem like he thinks he has a chance with me. Am I over thinking and he doesn't like me? Is the not mentioning the girlfriend on purpose? I like his girlfriend and I feel guilty even replying to his texts ;/ what should I do? He still doesn't know that I know about her and I do kind of like him :(

You should stop flirting with him, and not being a bad friend.

Also, so he dumps girlfriend and dates you. Who will be the new girl he is flirting with, when you not around. He is a player, not committed to one girl. He is not worth the time you took to write this question.

Whatever his game is, stop playing it. The drama, intrigue, and wondering is unnecessary since you KNOW he lied by admission. Go no further and remove yourself from the whole situation with him.

For sure to continue down this path gets you in deeper, and isn't the right thing to do. Nip it in the bud sooner, rather than later. That does mean cut out the flirting, teasing, and especially the texting. Who needs this workplace drama? Tell him to leave you alone COMPLETELY, or you will tell his girlfriend.

Really simple!