It sounds harmless to me, but if it's causing you some distress, I would suggest talking to a therapist about your childhood and learn some new coping skills. Also, have you tried journaling or writing stories about your fantasies? I'm not familiar with maladaptive daydreaming but I'm not an expert on mental health issues, either. I was diagnosed bipolar with psychotic features but am sometimes labeled schizoaffective. I guess I have some "delusional thinking" and while medication helps me...well I'm rambling too much. If you want to private message me, feel free.