She weirds people that care about you the fuck out and nobody with brains who really cares about you wants any part of that. Or her.
Open relationship, she brags. If that's true, your scene is a mess and nothing about it is mature, healthy, respectful, communicative, or open because your gf is not.
You can't trust her and think she's trying to fuck everybody, there's a reason for that. —Just ask your friends