Stop my boyfriend biting his nails

So no progress on this goal. Spent a whole day with my boyfriend watching the Twilight Zone and every now and again the hand went to the nails. It’s a reflex either to slap his hand away or to say “No!”. I feel like I’m treating him like a dog, so sometimes I use guilt.

I don’t do this in a manipulative way, but it really is hard frustrating trying to help someone who won’t be helped. Yes, I know, it’s NAIL BITING. But he bites his skin as well and it bleeds, and he wants to stop. So sometimes I say how I just want to help him and so forth, and he seems more determined. But it’s an addiction!! Hehehe.

It drives me crazy that he’s hurting his little nails and fingertips so much. He bites them so much they bleed! I try to give up but it’s almost a reflex now. I don’t want to nag… but it has to be done!