Plenty of sound advice here already Dang...
I'm 50, diagnosed low volume G6 last November and sitting happily on the Hopkins AS program. I can't see inside your head and anyhow, we're all different. However, what I can tell you from my perspective is...
1. If you accept your diagnosis and put it in a box that you diligently visit every 6 months and stop Googling (or even coming here) every day... You will get your life back and it will taste better. You have to live life, and now you have more motivation to do so than ever; don't wait for it to come to you. The feelings you associate with diagnosis will fade and become manageable if you concentrate on the here and now of life.
2. Sex is darned important and not to be given up lightly, especially if you don't need to do so. Sex is more important to some of us than others. To me it is a vital part of life.
3. Irrespective of the claims made by every man and his dog, treatment will guarantee side effects; you will never be the same. From my both primary and secondary research I can say that 'success' wrt side effects is almost universally overstated. Radiation is better, surgery is worse, individual results will vary. When I sat on a bed with one of the best surgeons in the country and he told me "even at age 50, with everything going your way on my best day you will probably only be 70-80% of what you are now I reckoned I was finally getting close to the truth.
4. You HAVE time. You may have MANY YEARS before you need to act. A good AS program will tell you when you reach that point. Trust them, trust the numbers; just like you do when you get on an airplane.
5. Not everyone is cut out for AS and that's OK... But make sure it's YOUR decision, not some muppet who doesn't have to live with the side effects for the rest of their life.
Above all... IT GETS BETTER, the panic and grief will subside and you will get your life back; apart from a few days every six months. Now go screw your lovely wife/lover bro.
Paul