I secretly like a man.  But I don't know if they like each other because I work with him. But I secretly like him. I don't let him know.  When he first came to work, he greeted me to flirt with me, but now he doesn't say hello anymore.  He greets me like a friend, but when he talks to me he acts like he's flirting with me. But these days he has a girlfriend and I feel like that guy is like a flirt, I don't know.  I can't understand his heart at all.Could you please tell me?