1. Clear boundaries: Clearly and firmly express one's position and boundaries, avoiding vague attitudes that leave room for imagination for the other party. Directly but politely inform the other person of one's feelings and decisions, without dragging the bush.
2. Reduce contact: Gradually reduce the frequency of contact and meetings with the other party until unnecessary interactions are completely cut off. Avoid spending time alone, reduce interaction on social media, and use time and distance as effective remedies to alleviate entanglement.
3. Seek support: Share your troubles with family and friends, their understanding and support will become your strong backing. When needed, consider consulting a psychologist or professional for more professional advice and assistance in dealing with the pain caused by this relationship in a healthier way.