For some context, this was my best friend for about 10 months by the time she cut me off. We basically spent all of last summer together and back then I couldn't imagine we would go our separate ways this soon.

Basically, the issue started when she would always talked bad about my other close friend because she was my best-friend's close friend, which she thought violated some unspoken bro code. But the things she was saying behind her back were really weighing down on me. I couldn't just sit and let her tear her apart, especially with the close friend not there to defend herself.

To simplify this, I will call my ex-best friend friend 1. The close friend will be friend 2.

Basically, I told a different friend, who we'll call friend 3, who I thought was a confidant that I didn't like how friend 1 was talking about friend 2, and basically revealed the reason to be that friend 2 was dating friend 1's close friend. I did it to release some of the weight from having one friend talk bad about another.

Within a few days, friend 3 tells someone else,who he says "asked" him, then that person tells friend 1 that she heard friend 1 has beef with friend 2. Friend 1 proceeds to tell me how mad she is at me, and I explain why I did it and that I was so sorry and that it wasn't my place. I basically admitted to my mistakes and apologized profusely. Friend 1 then tells me if I believe friend 3, we're about to have even bigger problems. I decide she is mad and give it a few days.

We go a few days without talking, and I come back and try to fix things after the dust settles. I send a long text message saying this isn't worth ruining our friendship over, that we have historically helped each other grow and we've been able to laugh it out together whenever high school gets rough.

She doesn't respond to my message at all.

Now, over a month later, we have the occasional small talk about grades or a test, but nothing that would be considered more than "acquaintance". I want to tell her how much I miss her, and how I just want things to go back to the way they were, but I'm scared the damage is done. 

I don't know if friend 3 said the truth that he got asked when he revealed this to another person, but we since have been pretty close. The only way I could think he relates to this is that she's even more angry that I have forgiven him for telling other people what I shouldn't have told him in the first place.

What should I do? Should I reach out to her? Do I deserve a second chance or is what I did unforgivable? Am I the asshole, or is she partially responsible for what happened to our friendship? I know we may never become friends like we once we're, but maybe talking to her could at least let us reach closure?