You never really understand the true value of this one person before he/she leaves you behind, goes away for never returning.
Well, I agree. But just maybe to a very little extent.
I mean I might just exaggerate this whole thing and stretch it to the sky to explain that people usually, like two persons only depart (unless there is some real avoidable situation or reason you can't deal with, which nowadays I believe its very rare, as everyone can live their lives in their own healthy way!) BECAUSE they want to. Because they cannot hold on to this thing that they shared anymore. Because it is getting too much to even breathe through it and there is a desperate need of some space. They depart. They leave. And they know what they're doing. Or if I will just not speak it in taking both the sides at an agreeable point, I would still say if only he/she decides to leave, or leaves, isn't there something "the one who doesn't want to leave" should give a thought about? For example, why?
I know it sounds too bitter and heavy. But I have realized this thing in a manner like this. And I guess it is fine, and much better to handle this way. Maybe way too practical in my approach. And I know emotions do shatter you down, lead you down the same lane again, make you think "what did I do for him/her to leave?"
Well, here it is. YOU DID NOT DO IT. It is (hypothetically) fate, destiny, blah-blah. And usually, the demand of life. The way you should lead your life. And if it takes leaving a few people behind in order to be with your self and your dreams, you will realize it is worth.
I have strongly, honestly believed this one, that if someone is not meant to be with you in the future, they won't make it till there.