How to help my boyfriend through giving up weed?

He's only given up since yesterday and tried a few times recently - not through pressure from me. I used to smoke it but gave it up 7 years ago due to priorities. I had to save money to get a place to stay after getting swindled by a letting agents and losing everything. So I did what I needed to do and I'm glad I did. It was hard because I was a heavy smoker but it was either smoke or eat and save for a better life.
I met my boyfriend and didn't realise how much he spends on it. He's gone into savings after leaving his job and has been unemployed the last few months. We don't live together but spend most of our time together. He can smoke 20 a day easily. So he started getting chest pains and anxiety about money but he always caves and goes back to it because he says what is the point? He's depressed without it, he uses it to calm his ADD, everything is boring without it, he's got no appetite and can't sleep properly and this is after 24 hours. It's a really defeatest attitude and it's more that it affects everything. I've been supportive in all the times he's spoke about quitting or tried. Told him to do it gradually smoking maybe one in the morning, one in the afternoon and one at night but he didn't stick to it. Then goes cold turkey and gets agitated. I'm not sure what I can do. I know you can only give up something if you really want to so I've never pressured him to do it. It's just getting a bit boring if I'm honest because i am trying. I give him massages to help relax, a shoulder to lean on and talk about it, trying to suggest things we can do to take his mind off of it. What else can I try? I feel like I'm struggling to keep him entertained
How to help my boyfriend through giving up weed?
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