Someday, you will look back and see the obvious pattern here. I know I didn't see it clearly until I was away from it for a while. My AH would do the same type of things. He joined a pool and swam every day--for a while. He decided to only eat healthy food--for a while. He got in shape, started running, did chores around the house, bought be gifts, etc, etc, etc. And it always lasted for a while. Long enough to get me to stop thinking about leaving and start thinking about staying. Google "cycle of abuse." It's the same thing.
L