I work closely with my boss, we are both married but I don't think he has that many things in common with his wife. He and I have many things in common so we are often talking a lot throughout the day.
With that said, I've really only noticed that he might be flirtatious just recently. Now I am not sure if it's flirting or just being really nice to me.
He always compliments me, like "I like that shirt" "I like that jacket" "I like that necklace" or he will tell me how great I am at my job and how he's so happy that I'm apart of the team. He has said once, while yelling at me