Bad friend 😡

I am convinced that my so called friend doesnt want me and my bf to be together. He and I just fixed things after a argument we had a couple weeks ago and my friend said my bf just decided to fix things with me because he had replaced me with another girl and he stopped talking to her. Like who tf says that? He's never even met him nor have my bf and I ever had cheating issues and I know he's a good man. Every time I'm happy with him, my friend tries to poison my mind with stupid ideas that don't exist. Idk if I should block him and never talk to him ever again cause I hate his negativity. Hes like a dark grey cloud! I'm honestly so sick of his stupid comments.