WIBTA for being pissed at my best friend who I believe is jealous?

Would I be the asshole for distancing myself?

so i have this best mate I’ve know since yr 7 and we was pretty close. However we was always arguing about stupid things then falling out but we’d eventually make up when I said sorry. I feel as if im slowly losing my temper with her recently. We was put in a gc together to talk things out and we did. But nothing has changed. I have tried to say i feel as if she has a problem with me and all she says is ‘I dont’ and leaves it as that. She’s apart of the same group; there is four of us. But i feel bad if I make it awkward.

i introduced her to my girlfriend as well,not long ago. she’s acting like she’d
known her for years, following her
around the shop, pulling her hood down and clipping things to her hair; generally being playful. Mind u shes only just met her.

I went and also got my septum done and asked her opinion first and she said it wouldn’t suit me, saying my face was too small. Generally being abit negative. She had this face on her when i got it done like she wasn’t happy.
she also goes to our friend and expects
him to sort out everything and got mad when i told her
to stop going to him and say it to me
if she has a problem with something i’ve done.

My girlfriend seems to have
a bad feeling about her and
doesn’t like how she acts and talks to me.
As well as my family beileve she is jealous.
Everytime I see her she doesnt ask how I am. She just talks about boys .

She starts drama and acts victim and wants us to back her when she is also in the wrong, and gets mad when I tell her that shes also in the wrong.
she also talks about me behind my back apparently and thinks I won’t know. She goes and has a tantrum everytime i do something but if someone else did the same thing she brushes it off and pretends it didn’t happen.

If I do something that bothers her she goes off, yells at me, becomes dry.
when she does it to me she acts like its all fine and brushes it off like its okay.

I also used to have red hair and she said it was copying her. Mind you she didn’t have red hair at the time.

Im not sure what I am to do but I feel trapped even. I feel like I can not talk to her, she doesn’t listen to me and I hate to say that as we used to be quite close.