I don't understand how some people are enjoying provoking each other and being such two-faced.

This Saturday morning, I woke up to this gloomy feeling and disappointment that breaks my heart, I don't know for how many times, when I know that instead of trusting me, someone I care about just trusts the one I know stabs him on the back. Someone who ironically never meant any sincere friendship towards him. God, please open his eyes out of this naiveté. Please do.