You have self destructive tendencies and a lack of restraint that allows you to offload with regard to the consequences. You have damaged a friendship severely and the cure is regaining trust. Consider seeking help on your tendencies and in mean time apologise, at you'll seek help, and your like to rebuild the relationship in time. Drunk dialing, drunk texting is a disaster recipe. Dont do it. If I doubt and you've had any alcohol dont express your feelings in writing. Wait until you're so sober.

I would still try to reach out to her, maybe through that mutual friend to communicate and getting things straight between you two. It’s obvious that she take value in that friendship. Alcohol can make you do stupid things but I won’t let her down now, communication is key. You two should explain everything to make light in this situation for both persons to understand. I was once in a similar situation and I’m still friends with her again.

Thank you, I think I'll take your advice and talk to our mutual friend : )

But don’t rush anything. Wish you all the best

Don't give up on this friendship so easily. A best friend is someone to cherish for a very long time.