She's single because she refuses to change her relationship status for someone who falls short for what she deserves. Knowing her self value, she's chosen to preserve a spot in her heart for a real man, someone mature enough to understand that loyalty, commitment, and honesty is a priority and not an option...
She doesn’t need a man to make her complete or maybe, she’s just best when taking care of herself rather than waiting with baited breath for ‘the one’.
She’s single because she chooses to be single and she finds her company to be enough.