A person can leave a pain in your life that you might mistake as feelings or a still lasting want for that person. You have to pull that pain out, and move on.
You, being an a good person and trying to Better yourself, what good is any of that if you settle for a person who isn't good in the ways you need. And same for them.
Everything needs it's equal mate, it's reason to exhist and be what it is.
Love is being that reason.
And without the equal, there's no point.
What good is wax without a wick to burn it all away.