The speaker reflects on a past relationship that has ended, realizing neither person was truly right for the other. While breaking up would have been painful, it would have provided clarity and closure. However, the speaker's fearful heart did not want to let go, and their busy mind distracted them from noticing the relationship had already drifted apart. Though the speaker has left behind the relationship, they have not lost hope of finding happiness and feel they are making progress in moving on.