Boyfriend overdosed..

Today my boyfriend overdosed.. he was fine one second and the next he was all white, including his lips and couldn’t breath.. they came and narcanned him. He’s currently not allowed back at the house cause my kids were here and social services got involved. Luckily my bf has great family that took him in.. I have no question that my kids won’t be taken cause I’m not gonna break any rules. I just need advice on dealing with him. I don’t even want to be with him anymore after this.. it’s been a ongoing problem