What can i do to make my boyfriend understand that i truely care for him and he needs to cut this crazy **** o

well every since my boyfriend started hanging out with this new breed of friends he does not call anymore or even come around alot like he use to and even on his days off he does not even call me. i warry about him alot because i warry something bad might happen to him if he does not slow down. All he does now is talk about his friend none stop when ever i see him sometimes after work. what can ido to show how him much i care and dont want to have anything happing to him.