Yikes...so sorry to hear this Trunk. :sigh: My sincerest condolences.
I lost my mom when I was 20 to ovarian cancer (she was only 51) so I know
some of what you are going through (loss like this is different for each person and each situation of course).
All I can tell you is that with time it gets better and easier, and I have for many years now (12 years after the fact this Thanksgiving--yes, she died on Thanksgiving Day!) focused on the good times she and we (my family--dad and sister and her) DID have and look at her death and my and my families loss in this way:
She got to do everything she wanted in life and had a good healthy (emotionally, physically, and lifestyle wise) life until she did die, and my family was lucky enough to enjoy her as a very loving and giving wife and mother for so many years. So many millions of people will never have any of this. In this way she (and we) was/is truly fortunate, even if ultimately her life was taken too soon from her.
This comforts me greatly at least (I'm not telling you how to grieve of course, just telling you what worked for me, as much as anything can).
That said, my father was a wreck for years afterwards (this was his one true love, he had known my mom since he was 19), never sleeping more than 4/5 hours a night and dragging himself to work, BUT he got better. He found that books on grief as well as local grief support groups and even re-entering the singles world (at age 53ish) did him a lot of good. He is still single now (at age 62), but had some significant relationships that helped him. He came to realize that HE was not the one who lost his life, that many people were out there in similar circumstances and could and would offer support, and that my mother would of wanted him to be happy.
Again, just telling you what he did and what he found to help, NOT saying it is right for you.
But I will admonish you this, and I can't stress it enough: KEEP BUSY! Keep your mind off of your loss (at least after you give yourself proper time to grieve) as much as possible. Re-engage with the world and your life no matter how hard it may be at first. Inactivity is a sure way to depression and pain in this matter (or really at any time), YOU MUST occupy your mind. And do things that you enjoy. You DESERVE to be happy (we all do) and I'm sure your wife would want you to be.
Also: GIVE YOURSELF TIME TO GRIEVE. DON'T expect to get over your loss within any time frame, much less let ANYONE tell you when you "should be over" your loss, even if they have been through such a loss themselves. Everyone is different with the time it takes for them to properly grieve, and forcing yourself to get over you loss sooner than you should (which isn't rerally possible anyway) can lead to problems down the road.
However, it is also true that if you are not getting better after some time then something is wrong as well. You should of course set your own grief schedule, but you should also start improving with time. So if you are not better after 3 months, 6 months, a year, 2 years, etc. down the road then something is wrong. At that point (if it happens, I'm betting not) you may want to get professional help. There is nothing at all wrong with this! My dad sought some and even went on antidepressants. Instead of prolonging his misery when other approaches weren't working as well as they should of, he got better (he is off them now but still sees a shrink)! Life is too short to be more miserable than one should be.
Speaking of shrinks, I sound like one!
Well I'm not, I'm just relating to you my and my families experiences with the loss of a loved one in hopes that it will do some good. But you don't have to (of course) agree with any of this or take anything from it. Remember that it is ultimately YOUR grief and no one else can or should tell you what you should be doing when undergoing such grief. And if they do, then they are not helping but hurting no matter how good their intentions are.
Take care, hang tough through those dark times (and there will be some, I won't lie), and this will get better with time, that I can almost 100% guarentee you! :twothumbs