Nor should you ever. As long as you are satisfied with your life and don't have any expectations of success, then you are golden.
I personally believe that is where folks misunderstand about this whole situation.
One should have standards, but they should never impose their standards on another through the glasses view of expectations.
I am married and trust me I fail and fail often, but I know how hard relationships are 110%. Men don't get women and women don't get men, but when both work together it can be pretty special given the differences (but in reality the sameness since we are all human and equal).