1. Clear rejection: Directly and firmly tell him the fact that you are married, and express that you do not want to engage in any behavior beyond normal interaction. Clear boundaries to avoid misunderstandings caused by ambiguous attitudes.
2. Maintain distance: After a clear rejection, actively reduce contact and communication with him, avoid being alone or participating in activities that may cause ambiguity. Maintain appropriate occupational or social distancing.
3. Inform your partner: If you feel that this behavior has caused trouble for you or your marriage, consider being honest with your partner. Facing problems together and seeking support and understanding from partners, while exploring how to better handle such situations.