Hey I've been there, and after reflecting on it, the truth is, (at least from my perspective), you don't really, truely want it yet. Don't take that as judgement, I'm certainly not in a place to judge, but I've kicked severeral multi-year addictions, and weed was one I had the pleasure of just "deciding to quit". For me quitting weed came with breaking a friendship of the longtime smoking buddy I had, though after getting off of it and reflecting, I realize he was just using me as a convenient spot to store his weed. YMMV, but I think you got this, and hopefully my experience lends some light onto your difficulties with quitting.

My fella found this talk useful. https://m.youtube.com/watch?v=gnSEbLX94Tk He used to smoke the mild stuff (low THC), but it's the cigarettes he's been struggling with. He's on his third attempt, but after using the technique (TL;DW: your brain doesn't understand negative commands, replace it with a positive command. Instead of "I need a joint", try "I need air" or "I need clarity" or whatever feeling you're aiming for) he's feeling a lot more positive that he'll stick with it this time. I tried to get him to read the Allen Carr stuff, but he's not much of a reader. Other people swear by it though. It's available on a certain library beginning with z if you want to give it a taster. Also learning a new skill can give you the same dopamine hit that your addiction does, so take up a hobby, learn a language, etc.

Good luck!