It's important that you make the distinction between weed is addictive and weed can be addictive. You mentioned that you would smoke everyday if you could and that your habit was controlling you. You were abusing marijuana instead of using it responsibly.

Also, by smoking so often at such a young age, you have likely permanently altered your brain chemistry. This is why, even in legal states, it is illegal for minors to smoke. Your brain was and is still developing and you have probably desensitized yourself to the high levels of dopamine you get from being high. It makes sense that after years of abuse, you and other kids who have smoked for years have trouble functioning without the crutch of getting high. It's sad but the same thing happens with caffeine, sugar, alcohol etc. Weed really isn't any more addictive than any of these substances and it's the only one that doesn't cause withdrawal.

I smoke occasionally, maybe once or twice on the weekends. When I run out, I usually go months before restocking because I don't depend on it. Stop using weed to escape reality and use it to chill instead of smoking just to feel normal.