There is no absolute answer to this question, because every friendship and situation is unique. Here are some points for your reference: 1. Analyze the nature of the behavior: First determine whether you think the "inappropriate behavior" is an occasional mistake or a long-term pattern. Many people occasionally behave inappropriately, but if this is the norm for your friend, you may need to take it more seriously. 2. Personal bottom line and tolerance: You need to clarify your bottom line and principles. Everyone can make mistakes, and appropriate tolerance can help maintain friendships, but this tolerance should not make you sacrifice your dignity or suffer long-term harm. 3. Pay attention to the reasons behind the behavior: Your friend's inappropriate behavior may be caused by stress, emotional problems or other reasons. Timely communication and understanding may help him improve and make your relationship stronger. 4. Communication and feedback: If you feel that your friend's behavior has affected your relationship, try to communicate with him honestly. Expressing your feelings and concerns will help him realize the problem and adjust his behavior. Such communication can also help both parties better understand each other's bottom line and expectations. 5. Balance friendship and self-protection: Friendship is important, but true friendship should be supportive and respectful. If a friend's inappropriate behavior makes you feel ignored and disrespected, it may have a negative impact on you in the long run. In this case, you may need to rethink how to maintain your mental health. In short, whether to "ignore" a friend's inappropriate behavior needs to be determined based on the severity and frequency of the behavior and the communication between you. Appropriate tolerance and understanding can sometimes consolidate friendships, but don't ignore your own feelings and rights. Finding a balance to maintain friendships while protecting yourself is the ideal state.