She has been my best friend for several months, and I have been hers at the same time. Both are sure that she and I are the only bestie to each other, loving each other deeply. This friendship is an honest and strong one. She is the cleverest student in our school, and I'm not so clever as her, but usually get high marks, so both are well known. Both have many same interests, especially maths, and when we train for maths contest, we study together. This is a very close friendship, calling almost every time, being close to each other, and many other things.
There have been many problems between she and I, and some are really big ones, those were hard times, but we could overcome those.
However, last Thursday, during class, after the teacher had given the assignments, I didn't get one fast, while another guy beside me had started working, so I impatiently said:
"Don't choose your favorite papers, just give me fast"
This upset her, and her eyes became teary. The reason she did what she did was because she was choosing a clean one for me. I didn't know this, and couldn't say sorry after.
Then the night before that, I unconsciously said a bad word to her, and she kept that in mind.
I have apologized in all possible ways, by phoning, on meeting, on texts, voice messages, but all are being ignored ignored.
She is the very first girl I've ever cried for, and I never want to lose her.
How can I make her come back to me? Is there anything I can say or do to help her come back?