How to Help Someone Stop Vaping

My SO got addicted to cigars and cigarillos a few months back. He didn’t tell me then, but when he came back from visiting a friend with a vape I kinda knew something was up. I didn’t ask about it for a month, and he was only doing it outside and away from me (I can’t stand any of the smells.)

But then I found out he had lied to me. I was told the juice he was smoking had zero grams of nicotine in it, and for almost two months I believed him, until I read the bottle and discovered it had actually been 3mg the whole time.

I know it could be worse, and we did talk about it. I know he’s trying to use the vape as a means to get himself off nicotine, but his use of the vape is getting noticeably more often...

I’m upset he mislead me, and I’m upset the vape doesn’t actually seem to be helping him quit.

How do I help him understand that I’m still a little hurt, but mostly concerned?