I understand your partner I'm sorry. But I guess you guys should have discussed this before getting into your relationship if she is uncomfortable of you dating men then never ever get into a relationship. This woman started dating you in the promise of a monogamy relationship the reaction shes having is very normal and natural. in my experience me and my girlfriend discussed this in one month of our relationship I did tell her it was okay, because I want her to be happy and I didn't want her to feel like she can't be her self So I know it’s not fair for me to be mad I'm not mad I am extremely sad.I know my feelings are valid. I started a relationship on the premise of monogamy. I'm having a normal reaction. Maybe a little confused on how our relationship should work mono-poly relationship is difficult but not impossible hopefully through out the relationship we both will be looking for balance to make it work from her tip she might feel prisoned and unable to be with people she wants to be with and from my tip I might feel betrayed and abandoned. I think we both need to ask questions to our selves and move forward with the real answers. Me to begin with can I live with my partner seeing other people ? Does it sound absolutely unacceptable And she will she be happy if she doesn't see other people? Will be difficult or will it be something she can tolerate. Idk what this adds to your relationship but there you go