Work
It's funny how people don't really understand that anything worth having requires work. Success takes work. Friendships require work to maintain. Relationships require a lot of work. Marriage, degrees, anything that comes with a title takes work. Blood, sweat, and tears type work. "I put my all in" type work. "I gave it everything I have" type work. "I wake up early and go to bed late" type work. I just don't get it. I do get it, actually. Things you don't work for, you don't value. They are disposable. So, people and relationships become disposable when you don't work for it. Things of little value can be discarded without second thought. What do you value? Who do you value? The answer to both questions is what or whom did you work for?