It sounds as if you are suffering from depression which it totally understandable. You could talk with your GP and see if he/she could prescibe you something to help. Individual counseling can also help a great deal.
Right now, even though your heart wants to focus on your wife, you need to be focusing on yourself and how to get yourself in shape(emotionally, mentally and physically) to deal with the challenge you face.
Once you are in a better frame of mind you will be able to access the situation better and make better decisions.
kat
Me-53(and learning!) S24, S21, D18, D17 Just keep swimming, Just keep swimming. Dory