That's not the point I'm trying to make. If she had a boyfriend, or a male best friend, or whatever, with her, I still would have done the same thing. She just happened to have a fiance.
And like I said, if this dude that has a problem with it isn't even a good friend of hers but just tried to date her or something in the past, he wouldn't be having issues with you hanging out with her. There's something more and you aren't saying what it is.