Pinky Promise
You know the worst part of giving something, or rather someone, your all is the immense amount of backtracking that you have to do afterwards.
You spend a significant amount of time with someone and you are bound to grow with them along the way. Then you're suddenly ripped out of the flower bed and it's over and you're crying and crying and just cannot stop crying.
You really have to start from scratch; you relearn everything, the things you grew from, but this time you do it alone.
After that you look for the lesson in your agony; you think about all the things you wish you did differently, remember all the times you were wrong and let your ego get in the way, and realize all the things you took for granted.
You miss them
Then it hits you again
All the things that you'll never get to be a part of again, all the things you'll never get the chance to do together, and the amazing people you won't get to see again.
You backtrack and you just have to relive the last year and a half without the best part of it there next to you.