1. Facing and understanding one's own feelings: realizing that one's emotional cleanliness disorder is a reflection of personal emotions and cognition, and there is no right or wrong. Trying to understand the source of this feeling may be a high pursuit of loyalty and innocence, or the influence of personal experiences. Accept your feelings instead of blaming or suppressing them.
2. Communication and Open Mindset: Have honest and respectful communication with your boyfriend, express your concerns and anxieties, while maintaining an open mind to listen to his thoughts and feelings. Understand his past experiences and try to see the problem from his perspective. Remember, everyone's past is a part of their present, and what matters is their attitude and behavior towards the present and future.
3. Seeking professional help and personal growth: If this emotional distress persists and affects your relationship and personal mental health, consider seeking help from a psychological counselor or relationship specialist. At the same time, engage in personal growth and self exploration, learn how to be more tolerant and accepting, cultivate a healthy view of love and interpersonal relationship management skills. Through learning and practice, gradually reduce the attachment to your boyfriend's past and focus on creating a better future together.