1. Understand the reasons: Communicate privately with your boyfriend and best friend separately to understand the specific reasons for their argument. Maintain a neutral attitude, listen to both sides' perspectives, and avoid making judgments or taking sides in the early stages.
2. Promote communication: After understanding the situation clearly, try to organize an event where all three parties are present, or guide them to have direct communication separately. Encourage both parties to express their feelings and thoughts, while also reminding them to respect each other's positions and avoid emotional language.
3. Seeking consensus and reconciliation: During the communication process, guide them to find common ground and understand each other's difficulties. Constructive suggestions or solutions can be proposed to help both parties reach a certain degree of reconciliation. It is important to emphasize the value of friendship and love, as well as the importance of maintaining these relationships. If both parties are still emotionally agitated, it may be considered to temporarily separate and calm down, and continue communication after the emotions have stabilized.