Is my taken coworker flirting or just being friendly?

Anonymous
I just recently started a new job and I met this guy there who always says hi to me and starts conversations with me. I kind of have been getting vibes from him if you know what I mean. I saw him at a club and he bought me a drink and a shot. And the other day he gave me his number and has been texting me thinks like “how are you :)” and stuff and added me on snap. But I looked his Insta up and he has a girlfriend, or at least one he posted kind of recently even saying things like “my forever” in the comments. My question is, is he just being friendly or should I be worried?
Is my taken coworker flirting or just being friendly?
4 Opinion