I am right now in the middle of that situation, my ex
You don't need to forget anything, you need to remember how to be by yourself. I think the day you wake up and decide, "I've had enough" is the day you begin to heal yourself. You might never truly be the way you were before all the chaos took over your life, but you will be happy - happier. Just take it one step at a time. One day you will look back and everything will be just memories, no feelings at all. You will be fine, even better.