Our choices sometimes contradict with our destiny. Explain in light of the main theme of the story?

The story shows that we make every choice only by ourselves and we can rule our life and control our feelings, as Frances chooses to kill her feelings to Jimmy and made a decision to be with Tom. Despite the fact that she chooses “second best”, but still this decision was way better to her as far as Tom loved her so much. So, this narrative shows us that only we can chose and only we can make our life better and stop suffering because of unhappy love.