Advice on my friendship

I’m sooo sorry for posting ANOTHER question about this, but I really really really don’t know what to do or anything, but here:

Okay so I said in a prev. Question I hang round as a group of 4 with my friends. About a month ago, a girl I’ll call ‘H’, decided we had to stop talking to one of the group of 4.

And trust me, the way H is, you DON’T want to get on the wrong side of her, she can be a total B!T(H. So we kinda drifted off from the other girl.

Okay so you need to know that to understand.

It’s been about a month, so the other girl just gave up on ever being friends with H again, or us to that matter, eventhough I tried to be her friend. H, me and the other girl, I’ll call her J, were just chatting in a 3 as usual, and at dinner H starts the usual, slagging off the other girl to us. After dinner, we went to german class, and I got moved next to J and we chatted together, as best friends do, and had a laugh.

But afterwardsn( I had to stay back to talk to my teacher, so J went out on her own to the next class). J told me that she said ‘H?’, because H just walked off, and snapped back ‘WHAT?’ at her. J was kinda shocked, cause there was no reason at all for it, and just waited for me to come out.

The only reason I can think of is that it’s cause me and J talked to eachother and not her in German. But that wasn’t our fault, because going to a school as strict as mine, talking to anyone who doesn’t sit next to you is a sin worthy of severe punishment.

J told me this, and we went on to our next lessons wondering why she wasn’t talking to us, then finished school and went to town before going to a presentation in which the school was holding on the evening. On arrival, we went to find a seat and find H and the other girl talking as though they were best friends. We were kind of shocked because H said she never wanted to be friends with her again and that she hated her, then here she is talking to her. So me and J go sit together.

This morning, I arrived in school to find H and J together, with H acting as though nothing had happened. But then, for no reason that I can think of, H walks off in a complete huff and ignores us for the rest of the day.

We tried to talk, but she just walks off. I still don’t get why. But in art last lesson, she was asking me ‘WHY ARE YOU IGNORING ME? WHAT HAVE I DONE?’, when she knows full well that she was the one who went off in the first place.

But I feel awful because I just completely ignored her, thinking that she gets what she gives. I don’t know if I’m right to feel awful or not, but still.

To be honest, what I want to know is do you think H is using us? It’s not the first time she’s done this, and she always seems to fall out with me and J and go back to the other girl when there’s no-one else around. However when the other girl isn’t there, and there isn’t anyone else to talk to, she talks to me and J like nothing ever happened, and it’s starting to frustrate me.

Sorry if this is long, or messed up. I’m really upset tbh.