Sorry to hear your hitting a bit of a rough patch, but this journey has its share of potholes. It time you will learn to avoid some and others that can't be, you'll learn to ease thru them so they don't jar you so much.
While the memories will always be there, the emotional intensity you feel behind them now does fade away in time.
After many hours dedicated to working, it becomes easier to stay in a routine that has been the pattern for so long. It takes energy to break the "rut". It means suggestioning some thing different of a fairly frequent basis and following thru and doing it. If you are going to put energy into it, it might as well be something fun or that you enjoy doing together, even if its just walking around the neighborhood.
... and I'd be very careful about asking for affirmations as just as often as not, it tends to backfire. Often, the S is giving affirmations, but not in a form we are expecting, o we tend to overlook what they are doing. Then when confronted that we are looking for assurences, they get offended that we have been blind by their efforts and that we have not acknowledged their attempts. This is where the 5 Love Languages and Mars / Venus books help out.