Most Helpful Guy
There's a third possibility here. Does he take many pictures of himself? Does he have many pictures with friends? Maybe he doesn't like to be in pictures.
If the third possibility is false, then I think you should worry. Not wanting to be seen with a person you're commited with is weird and the behavior is likely to be repeated in my opinion, but we can't be sure.
Most Helpful Girl
My bf and have been together over a year and we literally have only 1 picture of us together. Some people just do not like having their picture taken and when you get two of them together there's just not going to be many couple pics of them, if any.
Also he may have deleted her from his profile because he doesn't want you to accidentally think they are together anymore.