Hi Mindy...I can certainly empathize with you as we have a 16+ yr old and a 13 yr old. I do consider it an honor to take care of them at this point in their lives and we do our best to adjust to life such as it is now. With that being said I do think back to not so long ago and miss the energetic dogs that we had.
I miss our long walks in the woods mostly. We still go to the woods but it is very slow. The thing is THEY are just as happy as before. They still enjoy it so so will we. It's just the way it is now.
We do find ourselves checking Ginger's breathing if she is asleep too long. Don't have to check Hobo's...she snores
We would LOVE for them to go quietly and peacefully in their sleep but we know that that is very unlikely. So we pray for strenght and wisdom to make the right decision in a timely manner. So far, it is not time. I do take many many pictures and videos now as I don't want to forget a thing
I can tell you love your dog very very much. Just enjoy whatever time you have left and whatever quality that is. Your dog has no qualms about getting old. He is just going to live every day as it comes. Try to enjoy that with him. There will be time enough for sorrow when he gets his wings.
Good luck and if you do start taking pics maybe you could post some here...