I think I have reached that point also. This whole year I have been in C with two different Cs. One male, one female. I decided I wanted two view points. The female also saw my H for awhile and us as a couple for a month or so. Without rewriting my marriage, it is pretty clear that my H has been this way (all about me) for a long time. Basically unless he has his way all the time he feels trapped or controlled. He seems to have an inability to see others. He gets that other's behavior effects him, but refuses to believe his behavior effects others. He think they are just controlling him if they express any objection to his behavior.
It is really hard to deal with. After a while in my marriage I began to question this with him. Basically saying I felt my feelings didn't seem to matter when it came to decisions about time or money or whatever. He told me in no uncertain terms, I could do things with him he wanted to do or go it alone as he was not interested in anything I wanted to do.
He wasn't like this when we were first together. It was a slow a gradual process. Through out that time I did go along. But it became harder and harder to do. So I am thinking I may need a different solution here. One of sticking up for myself, but in a way that is not blaming or hurtful to others. When I do validate him I end up in the same place..him saying see it was all your fault.