I lost my best friend yesterday

Yesterday, my best friend and I argued we kept going back and forth and I should've stopped when I was told but he said he was done and none of my friends or me should ever speak to him again I said fine I feel guilty and a bit sad but have been trying to distract myself about the situation because he's been lying to me and a lot of other people we know also triggering traumatic responses and showing us his wounds to grab attention and he was just emotionally draining sometimes I don't know if this is for the best, because I still miss and care about him but my other friend said it was for the best maybe