It's true that you only appreciate things once you've lost them. Actually, no. I think it's unfair to assume that everything goes by unappreciated when it has never been lost. Let me correct myself, you appreciate things MORE once you've lost them.
I learned this the hard way. For so many years, I have always got back what I threw away. Perhaps that's why I took things, in this case person, for granted. I was so sure that I will always have this person so I throw words about separation and never seeing each other again like it was so easy. And during those times, I really though it was easy. In my head, I would think that I could be on my own, that I can forget this person so easily and all the things that came with him. But before I could even realize or experience how difficult it is to lose this person, the next day, the next hour even, he would go to me and ask me back. Don't get me wrong, I never did this intentionally just to bask in the glory of being wanted. I just never understood what it felt like to have something so valuable taken away from me. Before I even felt the pain of loss, I had already regain what I lost.