Quote from : Awakening Hope. a Developmental, Behavioral, Biological Approach to Codependency Treatment. Book

We will martyr ourselves, suffering under the weight of a non-reciprocal relationship until some part of us bursts in protest. Suddenly, we lose our mind, and allowing ourselves to heap all manner of nastiness, name calling, patronizing, death threats on the “deserving” jerk who has it coming after all we do for him/her! As the final insult rings across the room and we regain consciousness, we are horrified by what has come out of our mouth. After all, we LOVE these people, and we quickly move into anxious terror that this time we have gone too far . . . this time we crossed the line and they will leave us. So, we hunker back down and the martyrdom begins again. It’s a terrible cycle.