You've received many responses, but here's one more just in case you're still searching for answers....
You know what makes me feel better? Helping others really boosts my mood. When I assist at the local food pantry or even drop off my daughter to help work w/ her grandfather at a local shelter that serves food, I feel SOOOOOO much more fulfilled and happy.
What a way to honor your precious wife.....by giving back to others in need or distress. You could even volunteer at the agency in your area that raises money or collects items to sell for those with kidney disease.
There are so many people who could use your help...so many agencies wanting and needing volunteers, shelters, pantries, hospitals, etc.. And who knows, perhaps when you are ready, you might meet another very special person who, like you, is volunteering her time to help others.
God bless you during this difficult time. May you not isolate yourself or forget that there are people who love you, need you and want your company. Your wife would want you to be happy...to move forward.
I know you can do it. MAKE yourself do it. Do it for HER; I'm sure she is looking down at you right this minute and rooting for you.