What do i do with this friendship?

This is going to be a long story but please help me because I am stressing out so much
So my friend A told me that B hates C
and well, I know I shouldn't have but I did...I said I don't think C like B anyway to stand up for C and then I told C that B hates her
but C didn't say anything
The day after that, A told B that C hates her
So today, B told me that C hates her and so she hates C now
so I told her that C only hates you because A said you hate her
B denied and said she never said that
And then I again, I know I shouldn't have but I ask A what did she say
A said she didn't tell B that C hates her, and she cant even remember saying B hates C to me
But I swear she said it.
B said I shouldn't have listen to what A said and should have clarify it with her before telling C
and yes I agree but I already did it, B and C talked and they are sorting it out now
B thinks everything started because of what A said, which is kind of true
But I feel very guilty because if I didn't tell B what A said, B wouldn't blame everything on A
B said that because I didn't trust her so she is done with me
and also A might get really angry with me because I told B what she said
I know I did so many wrong things but I want to try my best to keep this friendship and solve all these.
Please help me with advices thank you very much