Addiction

My boyfriend keeps relapsing doesn't help that he's sells and continually gets high on his own supply.... I'm 5 months pregnant and feel like I keep putting my life on hold because of his addiction.. we argue every time I catch him doing it, I'm losing sleep.... we live in a room at his mothers MIND YOU I'll be giving birth in like 4 months?!!!!! I'm stuck and at the point I'm willing to call his probation officer and rat him out so I can get my life together and get the fuck away from him... what should I do? He needs help... he's family is in denial just as much as he is, there no help... I can't keep living my life like this... my poor daughter doesn't deserve this....