It would be irresponsible for me to offer a diagnostic opinion of your boyfriend, but what I am certain of is that several of his behaviors are not good for you to be around.
First, his family of origin has set the stage for teaching him how to be a man. If you do not want to be in the same role as his mother with his father, you will have to deal with the situation.
The photo of the orgy is proof that he is either lying to himself, to you, or both. It is a very immature way of coping, but this is who he is.
The work here is for you to realize you deserve more and better. Regardless if there is a diagnosis or not, dealing with his unacceptable behavior should be the top thing on your list.
I would contact the counseling center at the university you are attending. You are entitled to counseling if you are a student. This is a good time for you to know your rights, become whole, and see the situation for what it is.