"Time decides who you meet in your life, your heart decides who you want in your life and behaviour decides who will stay in your life... ...In the last analysis we will be judged by what we do and not by what we will say we will do - we are as we behave!"
You can't appreciate good times if you haven't gone through the bad. At the same time, you can't appreciate the good times if you're dwelling on the bad. You have to move forward and accept the changes and know that you deserve good things. It can be hard to do.