There's something so freeing about loving someone despite how mean they've been to you or despite how awful they've been acting. Is it true love if it's conditional? Is is true love if it's based on what you've done for me? That sound more like self gratification.
If you need a reminder, of unconditional love then look at the cross. It should be a constant reminder when you look at the criminal hanging next to Christ that was remembered despite what the charges were.
Try it someday. Be determined to love no matter what. "I love you no matter what" are the words and heart-filled emotion that should surface despite a person's behavior. I shouldn't need to see how you treat me to have love for you unconditionally...