Wonder How, Wonder Why!

How does someone who loved you with all their heart turn so cold toward you? 
How does a five year long relationship turn into nothing at all?
How does everything turn into nothing?

You can think it over and yet never know. It’s like staring into the horizon. You know what’s before you, and yet you fail to define it. It is harsh. And maybe you’ve called it upon yourself. But if one swore to always be by your side, where’s the fight when the going gets rough?