How the fuck did I get in this mess

My world is a frenzy of shitty results and sharp corners. I’m expected to be perfect because I’m the youngest only girl, but apparently that’s not what’s gonna happen. I used to be a Christian but now I think otherwise because of something’s i just recently found out. My boyfriend cheated on me after four years, with my BEST FRIEND, and my parents don’t even blink an eye. They say “hey since he slept with your friend you get to sleep with his.” As if I want to sleep with a player. I’m on this website so that someone can tell me what to do, how to do it, and who to do it with.