Sometimes people can come to therapy with the view to change their relationships. When an individual enters therapy it is themselves that change. It is not possible to change another person but what does happen is that you begin to change.
As you begin to develop emotionally you may begin to see your relationships around you in a different perspective. You may start wanting things from the relationship that you did not realise you wanted. Other people around you will not change but they may very well have opinions and feelings towards these changes. So it is not therapy that changes your relationships it you who begins to change and alter relationships if you want to.