So I have been basically befriending a girl for over a month now. We both have been hurt in the past so we are not really too eager to date, specially her. But I'm basically the only person she spends time with now aside from when at work. She has also been a regular when I'm out with my friends.
One thing I noticed she is calm and collected when we are alone, is not afraid of touching me or joking with me. Laughs at my jokes and even helps me out (like making a bagel or sandwich).
But as soon as she comes around my friends she starts acting rather immature. Mocking me and teasing and sometimes taking bad photos of me and posting it on our whatsapp group. When I message her after the fact and tell her that her actions made me sad she quickly apologizes, but it happens again the next day. I'm not sure whether I should confront her more seriously about this or just laugh along. I don't want to be a clown but I also don't want to be a douchebag party pooper either.
I'm not quite sure what to do and what she means by it? Advice?