People and relationships change and evolve over time. Sometimes what you start out thinking is what you need and want becomes burdensome or just no longer what you need to feel fulfilled. In order for a relationship between two evolving people to survive, they each must be willing to change their perspective and accept one another as they are and as they and their needs change.
The following is one of my favorite quotes:
We are not the same persons this year as last; nor are those we love. It is a happy chance if we, changing, continue to love a changed person.
W. Somerset Maugham
Change is inevitable. Life and love are about embracing the changes within you and the one you love. Unconditional love will accept no less.