Christopher Pike said this quote

Relationships are mysterious. We doubt the positive qualities in others, seldom the negative. You will say to your partner: do you really love me? Are you sure you love me? You will ask this a dozen times and drive the person nuts. But you never ask: are you really mad at me? Are you sure you’re angry? When someone is angry, you don’t doubt it for a moment. Yet the reverse should be true. We should doubt the negative in life, and have faith in the positive.