Believe it can be done. When you believe something can be done, really believe, your mind will find the ways to do it. Believing a solution paves the way to solution
Give all options to the opponent, if you win its historical, if you fight and loose- he is definite to loose next time, if you loose-you can enjoy his happiness even.
When guilt rears its ugly head confront it,
discuss it and let it go. The past is over.
It is time to ask what can we do right,
not what did we do wrong.
Forgive yourself and move on.