I have 3 different scenarios I need some help with.

I am over at a plates house, and the girls friends are there. They keep saying things like "you're girl is in the kitchen go find her" etc. How do I respond? I don't want to say she's not my girl and embarass her in front of her friends, but like saying she's my girl implies that I am also hers. Which I'm not.

I've been talking to this other girl that I met at the bar. We flirt quite a bit but she uses the whole IDGAF attitude. She responds with 'nah' a lot, but in like a flirty way if that makes sense. Basically what this has done is created a thing where we both just casually flirt but we both also put no effort into the convo, clearly both trying to get the upper hand. Is there any way to push past this? Would meeting more in person be a good thing?

And lastly, sometimes using TRP methods comes off a little jerkish, and this one girl I've been talking to said "I thought you hated me?" Clearly I don't, but how do I respond to this, and what can I do in the future to make sure I don't give off that impression, while still teasing her a little.