Hello I'm new to non monogamy. My partner and I are non monogamous. We recently met a friend who turned out to be very into my partner. He knew we temporarily closed the relationship. I left a party he was at early because I felt sick. After that he tried to make out with my partner and tried to have sex with him, my partner obviously said no. My partner told him to wait till we are open again because he was interested. We've hung out with him after that. I get really bad vibes and some of his behavior is not ideal. My partner is the type of person who loves to give everyone a chance. I wanted to give him the benefit of the doubt but I'm having a hard time. I obviously don't want to tell him to not see this person but it's bothersome for me. Any help would be appreciated. Please don't be mean this is my first non monogamous relationship and I'm just trying to learn. Thank you.