boyfriends best friend

my bfs best friend is the worst. i have sexual history with him and he's one of my biggest regrets. he overly took advantage of me knowingly and willingly what was happening and as well placed me in the most uncomfortable and unsafe situations ((toomuchshit))

i finally broke off from him and it had been months since i've seen him. lately he's been hanging with my bf because we all met through friend groups unfortunately...

i wish my bf wouldn't hang out with him 24/7. it ruins my nights dropping him off at a place that brings me dread after we hang..

not only has he placed my bf in dangerous situations and arrested in and getting in trouble, he's just a bad influence in general.

i don't know how to feel about this and the topic caused two arguments i think. wtf should i do