Owe nothing to anyone - except your obligation to love one another. If you love your neighbor, you will fulfill the requirements of God's law. (NLT Romans 13:8)
Sometimes, it will not take something really bad to make us question whether the person is worthy of our love. Often, it's because they don't take much effort to SHOW us that they love us (as written above), and then we question them if they love us. It also makes them question themselves of whether we are worthy of their love. Jesus only gave us two laws to follow: Love God and love your neighbor. And of course, for both, you love unconditionally~ whether that person shows he / she loves us or whether they are deserving or not. LOVE IS THE ANSWER. No buts or ifs.