How can I help boyfriend deal with his mom’s death?

My bf’s mom suddenly passed away (heart attack), boyfriend says he’s fine but I see he’s not. He says he doesn’t miss her and good riddance, she was an abusive POS and a scammer and I agree with him, but I see he is affected by her death: like he barely sleeps now and spends a lot of time at night just sitting on the patio and smoking (he had quit last year).
I told him I’m always there for him if he wants to talk, he’s the kinda guy who doesn’t talk about his feelings but two nights ago he drove us out in the desert and we stayed a couple of hours there just talking about staff.

any advice?

How can I help boyfriend deal with his mom’s death?
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