She would also act 100x happier if her friends were around, whereas she would look extremely depressed around just me.
that's a clue tho, isn't it? it's ALL an act. not just the two faces that they present to you, but the faces they present to the world. they want everyone to love them, especially their friends, so they act all happy around them. with mine, she used drink to facilitate this. the drunk version of her was, to me, utterly gruesome and revolting. she'd flash her body at people, jump up on tables, laugh louder than anyone else, and try her best to be the centre of attention.
around me, and sober, she'd be the most demure person you could imagine. or, at least, she'd pretend to be.
version. pretend. act. you see? it's ALL an act. all pretence. they aren't real people, just acting out a script. it's easier to act and pretend when you're not faced with a real person, so text works best for some of them (tho not all, and being drunk certainly helps loosen them up for a face-to-face full-on crazy-act).
and when the relationship ends, when they finally leave, or grind you to dust, then she'll make sure everyone can see how miserable you've made her, especially the men. the act will shift to how mean you were, or how badly you behaved towards her. maximising sympathy. and so the cycle continues.