Hi pleasehelpme18, Welcome to Healing Well forum. It is interesting that you posted this as I used to have a problem with this myself. It wasn't so much with my guy looking at it but with myself wishing that I could look like the girls on TV or the movies do and that my guy would want to be with them more than me. The thing is that I realized that the guy I was with was with me because he liked me....as I am sure that your boyfriend does you. Most men will tell you that one of the most attractive things about a women is confidence....confidence in yourself, confidence in your relationship.
Now, I am not saying that I totally grew this self confidence because I didn't, I had to work on it. My ex-husband would tell me I was fat when I weighted 110 pounds, I weight 10 pounds more now. He would watch TV and say "Oh I would do her" or "there's my girlfriend" and point out nudity, like a jerk and other choice names I can think of and have called him.
It sounds like you have an excellent boyfriend who is being totally appropriate behaving. Maybe if these type of movies do bother you this much, since they put warning labels on them you can look before hand and pick a movie that wont have this type of content to avoid conflict. I am sure that some of our other members will respond to your post also have have some suggestions for you...hopefully better than mine...take care.