I think my ex is still talking abt me and its making me so fucking angry

Like hes so delusional and thinks that I cheated on him and thats the world he seems tk be living in ig like its so fucking frustrating cause its like i didn't fight him on it or over explain myself because I literally wasnt cheating at all or even thinking abt it but apparently he just still thinks i was cheating on him and ive had him blocked for i think 3-4 weeks now ever since I finally broke off the relationship after back to back shit he put me through and everything but like omg, I barely even talk abt him (I talk abt him sometimes in conversation but not often as im trying to move on even though its still rlly hard despite all hes done and said abt me) but like omg, my friend told me he was talking tk someone else but hes so hooked on me?? I think hes fucking lying and I wouldnt put it past him to be. Honestly im so pissed off and need tk vent 😭😭