What can i do for my boyfriend i feel like there's something i should be doing?

hes had a pretty rough life he has a mood disorder and anger issues. he says his parents beat him (i don't know if they abuse him or beat him). his parents got separated when he was younger cause his dad would punch his mom hes also emo. he also has made some bad choices. he USED to smoke he stopped 9 weeks ago and hasn't started again (he swore to me he did and he did cause he knew i really cared about him and he didn't know anyone did) he drinks he did weed once and cocane once or twice he cuss's horribly he got a lip ring cause he paid for it and his older sister said she was his mom but his mom made him take it out. he gets in fights a lot. he got kicked out of pubic school. we have now been dating for over 4 months and he says he loves and and i love him too. but its a long distance relationship. hes my first boyfriend also. my mom knows im dating him but she doesn't know him and if she did she wouldn't let me date him. cause im a straight A student (mostly) Christan, never got in a fight, never touched drugs or achool or tobacco or anything of the type. So my parents would freak if they found out about us. But i don't care i love him and they can't stop me (well they can but just until im 18 then they can't) what should i do? :( i feel like i should be doing some thing to help him he also has a older sister shes in her 3rd year of 9th grade and a younger brother that's 9. and my boyfriends in his 2nd year of 7th grade. his mom doesn't really like care about them or what they do. but she made him take out his lip ring. what should i do :( is there anything i can do :(