first time i read your thread. forgive me if i did not read everything, but from what i got, i would like to comment........
first, the whole fantasy thing is a big NO. why? because you dont feel comfortable with it, so if you do it, it will be the starting point of a f..... volcanoe for you and your M. after you do it, you will get angry and eventually mad at him, and you will see that it did not solve your M. it is just stupid.
second, he maybe thinks that is the solution to your R? or that that will help some? it is not. you have to study what is wrong with your R, communication, unmet interests, needs, emotions.......that is the correct start. DONT GIVE IN.