boyfriend problems

i have been with him for 4 years, and he has become so verbally abusive that i'm starting to not feel so good about myself. he is a drug addict. i am not. he smokes weed since he was 12. he smokes many times in a day, first thing when he wakes up, chronic he calls it. he takes lortab 10 mg sometimes several times in a day, he takes soma alot and he drinks many beers in a day. he hangs with teenagers and kids in early 20's. hes 40. i am tired of the drugs but never wanted to give up on the love. pretty sure he is bi-polar. two years ago i was passionately in love with him. i tried to approach him today to tell him the drugs are making him mean. he shoved me and my left side is badly scraped from his hands grabbing me and shoving me. i landed on the floor. i did not call the police. i don't care if he goes to jail. i didn't want him to die on drugs. but i am dying inside. i want to let him go. he doesn't want to quit drugs. i want to quit loving him. how do i do this? he's a charmer, and the passion has always exceeded anything. he laughs at me for going to church. i want free from him, but he always talks me into coming back to him. im not setting a good example for my daughter, and im not happy with me anymore. i need help.