When a man is trying to show his interest in a real subtle way?

Question

because you are with someone, what would he do?

Answer 1

He might to get into 'listening' conversations and over empathize a little. Perhaps make slight protective gestures or out of character kind(er) acts. Smile or stare lots and depending on the relationship between he and your significant other may even make attempts to verbally abuse the significant other.

Answer 2

He will try to get your attention by staring. Once he has your attention, then he will wink as though the two of you have just shared a private joke.