Scott,
I lost my Dad 26 years ago and Mom 21 years ago.
I think about them every day...
Hang on to the good memories and be with your Mom as much as possible right now.
I lost my Mom to brain cancer 2 years ago and yesturday was her birthday. A very rough day for my dad, but he keeps getting better. They were married 41 years.
It's scary when you start making the same noises as your coffee maker.
My Dad went in 2004,at the age of 84, I still think of him and say "I wish Dad could see this , or I wish Dad was here for this...". Mom is still alive but has Dementia, and doesn't always remember too well.... I know what you're going through.. Remember the good times..... it makes it easier.