One loss should not lead to another

I just read something on David Bach's column in Yahoo! Finance. He says

"Even the toughest people need to take time to grieve. And often, the tougher you are, the harder it can be and the longer it can take. "

I thought how true this is for me. My dad's 4th death anniversary is coming up. Sometimes, I still wonder have I got over it or am I still confuse about it. You can choose to be bitter or you can choose to let go and move on but life goes on. The future is waiting for you.