Kissing your bestfriend's boyfriend

Before starting describing the whole situation, I(25F) deeply know that I was so wrong.

Me and my bestfriend(25F), we know each other for a year and we really love and care for each other. I have always been a supporter of her relationship with her bf(22M) no matter what other people said. To me, as long as she's happy I will be there.

Just recently, I went to a party with my friends and I met her bf there. She wasn't there since she came back to her hometown 2 weeks ago. As me and her bf have known each other and hang out a couple of times before, we were greeting and talking to each other just in a friendly way. I was really drunk but not in a state of blackout so I can still remember some details.

At a certain point, he asked to go for some more drinks and I agreed but in my mind I thought he asked the whole group. When I looked back there were only me and him go so I dragged my male friend along. We were having 2 or 3 shots more and went back to the stage. I followed him because I thought it was safe to go with him. I also dragged my friend along with me all the time. However, in the middle of everything, me and the boyfriend started kissing. My mind was blank, the only thing I could remember was that the kiss was really intense. I was drunk and I think I really went for it without thinking. When the light turned on at the end of the party I got some of my sanity back and he was looking for his phone. I was a bit confused didn't think of anything and my other friends came to tell me to go home. I said yes I would leave with them but the boyfriend told me to stay back and wait for him and he said "it wasn't enough". It shocked me and made me so awake that I told him to go rest and and fleed as fast as I could. I even left my jacket back at the cloakroom and had his coat on (he offered it to me when I told him that it was kinda cold today compared to the last time).

I went back home and slept and when I woke up I saw him requested following me and called me after. I know it was so deeply wrong about what I did. I was really hesitating to tell my bestfriend. But after thinking straight, I decided to call her and tell her about that because I think she deserves to know what was happenning and I owe her more than an apology. I knew it could sabotage our friendship but I was so wrong, I dont even think I derserve to be friends with her anymore. I really want to say sorry and tell her about all of these but she said she needed space and drop the call. I tried to call her again and text her if I can call but she's not responding me anymore.

She and her boyfriend is still together now eventhough she told me on the call that she broke up with him straight away. It is understandable since she really loves the boy and it seems like nothing can break it. But she removes me from her Locket and instagram closed friend. I think she cuts me off for real. But something she did not know is that the boy is on dating app just 1 week before she went back to her hometown

I still have not had a chance to tell her the details of the story but since I was so wrong, I should not expect anything. My stupidity while drunk is ending the friendship that I value a lot. I am in so much pain and guilt.

She will be back in around 2 weeks, is there anything I could do in this situation to just stay being friends with her again?

TLDR: I kissed my bestfriend's boyfriend at a party where she wasn't there because she was back in her hometown. I knew what I did was wrong so I told her about what happened. She still decided to continue her relationship with the boy and cut me off. I know I shouldnt expect anything but are there any ways this friendship will survive again?