I get physical wd from weed, no mistaking it, for me it's gone in three days, but it's months since I had a day off from weed. I've always believed age plays a huge part in addiction. I smoked weed from 12 and cigs from 17, I quit my 30 a day cigarette habit years ago but not weed.
Find a specific reason why you want to quit and keep it in mind I guess. As a parent, I'd like my kids to get exam passes before settling down comfortably with any drug, you're young enough for that to be a reason?
Edit, I remember now what I meant to say. Some opiates are potentiated by THC so when you take both a lot then quit weed it is literally opiate wd because the amount of bioavailable opiate in the absence of weed just dropped by maybe two thirds (I read this for buprenorphine). It's to do with the body using the same method for removing thc as it does to remove some opioids, so the body must choose which one to tackle first and it chooses to remove THC first. This method of drug removal is then busy and doesn't get around to removing the opioids until later, sometimes much later. That's the theory for opioids with high receptor affinity like bupe I read from a medical study I can't find now (of course).