Too Much Time

I know its getting hard    
but the honeymoon stage just ended
Two years is too much to throw away    
   
You know it isn't working now    
But in the end it will all be worth it    
Three years is too much to throw away    
   
You are at your wit's end    
But you still remember those few moments where you were ecstatic    
Four years is too much to throw away    
   
You can not take it anymore    
And this time there are no "but"s to compensate    
You've thrown five years away    
   
For what?