Maladaptive Daydreaming: where wild minds come to rest
It was years before I told my partner. If he caught me talking out aloud while daydreaming I would say I was talking in my sleep. LOL! After we had really got to know each other and we had shared intimate private aspects of ourselves to each other, I felt comfortable to tell him. I told him about it and he was very understanding. He recently caught me in a MD situation and was able to snap me out of it.
I think you should tell your partner when you feel ready to tell him. You could even just start off by saying, "sometimes I do weird things when I daydream." It doesn't have to be really detailed then a few years later, when you are living together. Then you can explain MD to him.
I don't tell. married 22yrs