This will be a long one. Sorry for any mistakes, I'm on mobile and not a native. This happened on Friday.

T= team mate 

G= our friend (more her friend) 

F = bf's friend

BF = boyfriend

Me= me


Let me start by saying F is (was?) a good friend of mine, too. At 6 am, I noticed that we were missing an important part of a drawing project due later. I hadn't noticed before.

I texted F and she got mad that I didn't tell her sooner. I figured she wouldn't fix it (school lends us PCs &amp; wacoms, and we had two free periods so there shouldn't have been an issue), so I did a quick painting over my template (she was supposed to follow it so this wouldn't happen). I didn't use F's drawing bc I thought it would be rude to change it. 


Fastforward to 30 minutes before the class, we're sitting in a classroom. G and other 2 students were there. I showed F what I had done in those 2 periods. Once again, F brought up that it was my fault for answering so late. I told her "you had the time and means". F got mad and continued talking loudly. Then, F got angry at T over the gc for not submitting the image to the teacher. No one had told T to send it, but we all assumed he was going to. I told F something like "you can't expect T to send the image when you didn't even send it to him through e-mail. You sent a low-resolution jpg in the gc." 

She got louder "No one told me to send it. How was I supposed to know?" I thought this was hypocritical of her and told her "You already know the gc sends low-quality images. No one should have to tell you, you're not a little girl-" 


F cut me off, shouting: WELL, YES, I AM A LITTLE GIRL


G &amp; I: no, you're in university-


F: I HAVE THE MIND OF A LITTLE GIRL, YOU SHOULD TELL ME THINGS AS IF I WAS A LITTLE GIRL


G: no, you're not, and- Me: Ok, don't interrupt- (at the same time) 


F: I'LL INTERRUPT ALL I WANT BC YOU'RE BLAMING ME FOR THINGS I DIDN'T DO AND NO ONE TOLD ME ABOUT. YOU'RE ANGRY AT ME FOR THINGS THAT ARE NOT MY FAULT


She stormed off. I sent T my image and told him "make both versions and send them, pls" He did &amp; we went to class. 


F entered the class &amp; didn't look at me. We presented. The class agreed her drawing was prettier but mine fulfilled the checklist. I talked to my teacher and my bff and both told me to cut ties after the project was done.

Then I told my BF. He defended F &amp; said "Please understand F, she's having a hard time. Her mental health is bad. I know this doesn't excuse her but maybe it was a bad moment. I think you should just talk to her". This hurt me a lot as I have mental health issues, too. 


I have F's texts to BF if anyone wants her side on this. 


AITA for not wanting to apologize? And most importantly, Would I Be TA for asking my BF to side with me on this? 