Hey Andy.
I understand completely what you are saying, particularly the part about going to sleep and not waking up.
When I was first diagnosed, it was round about my 30th birthday (I'm 35 now) and at the time I was living on my own and feeling isolated from everyone and not having anyone to speak to.
One night when I was feeling particularly down, I wrote my dad a letter because I really didn't want to wake up. In it I told him not to blame himself as he has done everything he could and I didn't want to be a burden any more and that I had decided to just not wake up.
I really had convinced myself that if I wanted it bad enough, then it would happen.
Fortunatly, it never happened and I did wake up.
It took a while, but I eventually got to place when I was happy and not just going through the day-to-day motions of life.
I have met someone that understands and id very patient with me. The best thing to do is not to rush into anything, take your time and become comfortable with yourself. There are people out there (here) that do understand what you are going through as most of us have felt the same at one time or another.
Stay positive and keep us updated on how you are doing.
You'll always get words of support here, you might not believe them, but they are ment from the heart.
Ally.