why am I dreaming of her

Me and my ex broke up a year ago now I'm over her and wish her the best in everything that she does. And honestly we were never meant to be together. She has a gf now the girl she left me for so it's not like I want her back because I don't a woman can only take so much anywho lately I've been thinking about her and even dreaming about her but not like getting back together or sexually. My dreams are me becoming friends with her gf which will not happen, me helping one of her family members because I'm becoming a doctor etc hat do this mean it's been going on for about a week in a half