Um, I doubt the reason that your dad is an addict is why you have a strong feeling to smoke, though I know what you mean. When I was in 7th grade, my friends all smoked weed a month before me and I started learning about it by talking to my mom. Then, one day they introduced it to me. I always had wanted to smoke with them. It's more of a tension, due to you seeing others do it. Since you see your dad do it, and probably hear about friends doing it, you have a tension to as well.