[Rivière]

Based on what you've written, it comes across like there's a bit more going on with your friend. Her behaviour seems a little peculiar. Have you considered asking her why she wanted to out you and your girlfriend? If she really cared about you and thought highly of you as a friend, all the things she'd considered doing wouldn't have even entered her head. There seems to be a bit more to it than her just suddenly getting annoyed and making comments like that.

She also lied about the fact she'd claimed she'd told her friends about her piercings, so who knows what else she has lied about. Or if she were to decide to share other information with them that isn't any of their business. Not only that, I have to wonder why she decided to share the fact she has piercings in certain areas in the first place. Sure she's 18, but many parents are going to become quite protective over certain locations of their child's body.