Marijuana and depression theory?

I smoked weed daily for about 5 years, when i stoped for a few months i got really depressed most days, didnt think it was anything to do with smoking in the past. Then i had a little joint 1 day and my depression went and i thought damn why didnt i think to smoke to help my depression? A few months later i gave it up again because it was messing around with my head (paranoid, anxious, memory loss), And i became really depressed again. Marijuana in the long run will make you very depressed, it really messes up your mind aswell, it ok to smoke a little bit with friends now and again, but when your doing it every other day, it can leave you with serious mental health problems. Ive experienced it first hand. But every 1s different it effects people in different ways.