You have to acknowledge it so you know what you need to let go of.

There are some questions that there are simply no answers to, not even on Google. Things happen in life that's just life. Wasting your time looking for an answer to why something may have happened or how on earth it could have even happened at all when there isn't an answer is a waste of time. The sooner you can accept it for what it is the sooner you can forget about it. Keeping it fresh on your mind will just keep wasting your time today. Acknowledge it for what it is then JUST FLUSH IT out of your mind so you can enjoy every moment that you have.