Male friends advice fwb/gf

Basically Ive been going out with a girl for 3 weeks now and we have had sex a few times and we are really liking each other. The problem is that I possibly might have ruined things because she had tell me she cut off guys from her life that could possibly be interested in her and today I told her after she was telling me about a male friend that tried things with her recently and that she stopped talking to that I didnt want her to have any male friends (in terms of guys she DM's or keeps a lot of contact) because I said I dont believe their intentions and that guys and girls can be friends. I told her she would have to make a decision if she wanted to be with me she should drop them and she told me after a small drama that she would. When I was hearing her tell me about the male friend story I got kind of distant and cold because thats a hard topic for me since my ex cheated on me with a male friend and I told this girl that. In addition to this she wants to follow a military career which will start in a few months so I know she would be in contact with a lot of guys which is something i really dont know if i could handle. Do you guys have any advice for me, was it to early to bring this boundary? Because she is being distant. i would love to know your opinion on the above questions