I just accidentaly broke my best friend and his girlfriend up and hes rly mad?

whether you had good or bad intentions honest truth, you didnt break them up, they already had their own problems going on so why beat yourself up about it? The best you can do is apologize to your friend, and next time stay out of peoples drama, because it only brings you as a witness time after time. Ive had this experience plenty of times, in my case I had a huge mouth and was only making things worse when drama got out of hand. once I stepped back and let others reslove their conflict, it was a big relief