I’ve read more about your bf and I’d say there are more issues here (in a relationship and him personally) than him wanting work away from home. He is using Kratom throughout the day and plans on driving truck for a living? Not only he doesn’t sound well enough to do such job he endangers everyone on the road. Overall he doesn’t sound like a dream come true man of your dreams.
Are you supporting him financially at the moment? I’d start thinking of an exit plan honestly, you sound like a wonderful person and he kind of sounds like bad news to me. He might be a nice guy but isn’t life long commitment material. You can do better. Also his talk about that job could be just a talk. He might be got used to you paying for things. Who pays for groceries?
Someone on this thread mentioned marriage and children. I don’t know your age or if you plan such things but I’d urge to not marry an addict without a job and absolutely don’t have children with an addict. No way no how