ex still in love with me

my ex and i broke up but we still mess around from time to time and he thinks there is still a chance that we may be together in the future when i honestly don’t want to ever date again. just for us to be friends and mess around. i feel like us messing around is what makes him feel like there is still a chance even tho i’ve made it clear that it’s friends with benefits. should i let him go and stop talking to him?