Girls, How do you fix a great female and male friendship when the guy fucks up? Guys, How do you show her you're sorry and show her you truly care?

I made a big mistake and can't say I was in a clear headspace when it occurred but I fucked up big time and she means a lot to me but is so angry that I don't know if she going to come back...

Girls, How do you fix a great female and male friendship when the guy fucks up? Guys, How do you show her you're sorry and show her you truly care?
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