Glad you are doing things that bring you pleasure. What about your writing, CL.....is it still another outlet for you?
Not practicing dancing with your wife did upset her, but if you had practiced without your heart being in it then she would have found fault I suspect. Did you tell her you were tired or just decline?
What about an alternative today.....can you invite her to take a walk with you and your puppy? A movie? What about the $4 bouquet of flowers? It doesn't have to be for an apology (since you don't owe her one!); you can just say you have spring fever from a touch of the warm weather!