SO sorry youre having to deal with this. Men are visual people where women are feeling people. Fantasy is not always bad. I am not in your shoes and am not in any way discounting your feeling. Men have totally different thoughts, feelings and needs than women. I would much rather him look at pictures occassionally than go out and meet women. If you talked to him I bet he would tell you that he loves your very much just the way your are!!!
I bet he would also tell you he doesnt "need" to see those pics before turning in either!! You are so much more to him than a lover!! No one can fill your shoes!