Okay, I will go out on a limb and give you a little relationship advice.
If, 'if' you don't want to be married to your wife, end the marriage before looking for a new partner. Do it the right way, if you decide to end it. If you want to stay married, why not try some couples counselling?
I think that if you stop drinking, you will have a much clearer idea of what you want in your life and which way to go.
