Best friend break up..

So my best friend went out on me and it really sucked. She texted me that I was texting with her bf and doing sexual things. I had only flirted with him once and it was on accident. Her boyfriend had been the one to try and do sexual things with me. I do have a boyfriend though. I haven’t talked to her bf in about a week. And she texted me last night saying “I know you are still talking to him. You need to leave him the fuck alone or o will come and beat the shit out of you” I told her I haven’t talked to him in awhile and she didn’t believe me and she ended up calling me a hoe and a bitch. So I just blocked her. I don’t need that kind of negativity. It’s not that she was a bad person she was an amazing person. I know I shouldn’t have flirted but idk what to do.. If I could get a hype up... That would be great because I only had one friend and it was her..