This is SO TRUE - You really don't understand it fully until it happens to you. "There are some people who could hear you speak a thousand words and still not understand you. And there are others who will understand without you even speaking a word.
The person might not be who you thought they were; might have changed for the worse; but in the memories, they will always be the person you loved. it's ok to cherish those memories. You dont have to allow that person in your life now.