How is someone smarter then another person?

You can show appreciation to someone else by treating them nicely. If they show that they love and care about you, you should do the same things through your actions.

well if you talk about their privacy as in where they live and etc. but not really unless they think it is an invasion of privacy.

They start to act really weird around you and if u watch their face you can tell that they're jealous. When I'm jealous my brow wrinkles and I push my lips together.

On the lighter side or good side: Truthful, honest.............On a different level: a rat or tattletale, busy body, nosey

if you mean like if ur not coming to work and someone takes ur place i think its called covering