How do i break up w someone

So me a d this guy hadn't been friends for long but he has a history (2 exes) of being desperate for female interaction and i had kimda lead him onto thinkjng he had a chance w me when we had gone to dofe, well me and this guy had gotten wayy wayyyyyy too close on dofe cus obv we were tgt the whole time for 3 days w no phones and we had to rely on each other so by the second day me and him were sleeping on each other during breaks and were homding hands everytime we walked. I thought we had ended up reaching a point of no return so i thiught fuck it might as well say yes but thinking abt it now this guy has a reputation for bejng a bit odd and he has yellow teeth and big pores(huge deal breaker icl) and im kinda popular. Well this guy honestly isn't that bad he does mountain biking, does daily runs, goes to the gym, goes hiking a lot, proper smart, tall, nice eyes and stuff but he js had a weird personality in a few yrs back and idk if he's lying to me abt changing. Aswell as that idk i REALLY like him cus idk if i rlly wanna deal w commitment rn i lead him on bcs it was fun not rlly cus i wanted a relationship but now it's gotten out of hand and i think my friendgroup is highkey breaking apart bcs of dude cus no one rlly likes him.. also this is my first relationship and he sniffs me + pulled me back for a smooch on my head when i had pulled away

Rlly confusing explanation but idek if id said everything Σ(っ°Д °;)っ