What makes a man is not how he behaves in front of people but rather how he behaves when no one is looking.
Behaving in front of people just shows that you have manners or self respect. It shows that you want to present yourself in a certain way.
But what you do when no one is watching, how you behave when no one is looking and judging, that shows who you really are.
Think about this and think about wether or not you like this person right now.