In order to process and move through past endings, the mind begins to construct stories and narratives of why the ending happened and what the breakup means about you.
This can be a really difficult part of the process because if we haven't looked at the deeper beliefs we hold about ourselves consciously and unconsciously, then our feelings of unworthiness and the story we've been telling ourselves our whole lives will receive the evidence it is looking for.
By connecting deeper to the stories and what they mean, we are able to better process the heartbreak and better understand and build more awareness. So you know more and build strength and courage with what you do know and learn from it.
That being said, not all the versions of your story are a true representation of you or a reflection of you.