As a guy that has been married a long time the only platonic female friends I had were before I got married. Once you have a partner then everything changes. The only platonic female friends I have now are friends of my wife or women at work. I maintain contact with some of my pre-marriage female friends but not many and we aren’t close anymore. The problem after being around married people for so long is that I’ve seen too many relationships wrecked by by close friends of the opposite sex. Even my wife had a brief emotional affair with a friend’s husband. We patched things up years ago. You have to have a strong relationship with your spouse to maintain a relationship with someone of the opposite sex. It’s very tough thing thing but I think can be done.