I don't believe in what if's on account of their being both utterly pointless dwelling on that beyond our capacity to change.
I believe what happens happens for a reason, be it divine intervention,(some sort of god) or cosmic galactic pull of one element-microbe from another etc etc, either way, I try not to dwell too much on what could have been, given there is no way of being able to know for certain, WHAT IF!!!
Ie, you hear people say...."What if we had have made a go of it"
I say, what if they had, then were killed in a car accident together 3 weeks after their wedding!!!
See, this is just it, you never know!
So rather than second guess the past, and exclaim "What if"...better to make way for the present /future, ie, "Whats now".....
Eat some Vegemite on a spoon and spend an hour out in the sun, it has B vitamins, and the sun provides Vitamin D, and this is whats responsible for most peoples winter blues.