Life is a math problem

everything happens for a reason. i keep given myself that reason... but still for some reason... that quote just doesn't reason with me mentally,emotionally or spiritually. I mean, whats the reason for things happening for a reason? whats the reason for certain things NOT happening? & if there's a reason 4 everything, ...whats the reason 4 the present/past if it dont make sense??!!
I usually find myself in these moments where it feels like time is frozen, and i see a play-by-play of every single milli-second of my life and the people in it. Its like a math equation that i cant figure out. some things add up, some things don't. I find myself adding..subtracting..dividing and multiplying day to day situations, statments made my people around me, questions asked by people around me...its like Im on a mission to solve a great mystery..like why certain people are in my life and why others are no longer in my life. I try to find the value of "X" and "Y".. trying to figure out if the people in my life are going to be here for the long haul, or if they're temporary... i dont like not knowing... and I think that in itself is a curse..because we live in a world full of unknown.. we are more ignorant than what we want to be.. there is more unknown than known.. this is just my opinion though. Quantum physics has me confused. Life is a big math problem.. everyone has different formulas..but no one has the same answer.. and its because no one is living the same life..yet we're all stuck on this planet.. with ideas..hopes..dreams...premonitions..but what does it all lead to? whats the meaning? Why do we encounter situatios..people? how is it that certain people have the power to affect us in the most extreme ways? even the slightest actions and statements from certain people...have so much power over us.. im still doing the math.. but I don't think i'll ever understand. Did i mention that math is my worse subject?