You are doing more that ok, you are doing really well under the circumstances. I know it’s a terrible shock and such a huge adjustment after half a lifetime togther. It takes time to disentangle your lives.
When my ex left what struck me most was how much free time I had. I spent so much listening to his work problems, his political opinions ( which I didn’t share ) and his sport ( in which I had no interest ). He didn’t virtually nothing with our children so that didn’t make much difference. We ate the food that he liked and I put on weight. We drank gin and white wine because it wasn’t worth opening a bottle of red wine just for me.
All trivial stiff I know.
I even watched Tb programmes I didn’t like because I thought we should spend time together in the evenings. I had sex I didn’t particularly enjoy at times when I didn’t really feel it. Because he was rarely interested so I thought I should take the chance when I could.
So once I got Over the shock of him leaving I was REALLY HAPPY to have so much time to do what I wanted to do. I felt a bit guilty for some reason but once I got used to it, it was great. I’ve l now made lots of good friends through my hobbies.
I also realised how much of our marriage was me providing different types of servicing to him and how little was reciprocated. Everything was about him.
I have no idea why I’m so stupid that I didn’t work all this out until after we split, but there you are.