Hey, I don't know how to start this, but here I go.

I (18F) have been in a friendship for at least five years with this best friend of mine, and I honestly thought she would be the aunt of my kids. We had one major fallout, but we recovered and healed from it.

Recently, we both went to a concert, and she told me her friend would tag along too. Her friend doesn't like me at all, but I thought, "For your sake, I can bear her presence." I was nothing but welcoming to my bestie's friend.

Midway through the concert, my bestie's friend ran into her ex, and they kind of talked (which I think is stupid, considering they had a massively bad breakup). But whatever — none of my concern. After she talked with her ex, something happened apparently, and she and my bestie went somewhere more private. I don't know why, but they left me in a place full of strangers where I literally didn't know anyone.

For some background: my bestie has this weird thing where she changes the person she obsesses over every year. So, during the time I was left alone, I did some thinking — and honestly, this isn't the first time my bestie has pulled something like this. After five years of taking her shit, I’m kind of done.

But I also don't want to risk my five-year-long teenage friendship over something petty. She's been texting and wanting to meet up, but I am honestly so done with her.

So, AITA?