My wife and I have grown apart sexually

My wife and I have completely grown apart in regards to sex. When we first married she was down for anything whatever we wanted to try. Pegging chastity ballbusting anything but as we got further along it became less and less. The. I would have to nudge he to do anything others than ordinary sex. I want more than vanilla sex. I don’t know how to approach her about it I don’t want to argue about it with her. I am just not satisfied sexually with normal sex, is this normal do I just need to move on and forget about it ?