Have you and your girlfriend figured out how in the loop you each want to be in each other’s meta relationships? You should feel comfortable coming to your girlfriend and admitting you have feelings for someone you’re hanging out with regularly. For your girlfriend’s part, it’s okay for them if they lean into the compersion of it and want to hear everything about you and Emma, or (if they maybe have some jealousy they might need to work through) ask you to just keep details to yourself.

As far as Emma goes, I don’t think there’s anything wrong with saying to someone that you’re happy with your current relationship style, but also open to being more intimate if they are. Leave it at that and assume you’re still just friends until Emma suggests otherwise.