A friend of mine did a 90 day in house treatment for her addictions here:
http://www.edgewood.ca/
She's been sober for 14 years now. It's pretty expensive, but it's got one of the best success rates in North America. (Was even a treatment centre on the show Intervention)
I think if there's a family history your addiction may run deeper than just psychological. They say that people can be physically predispositioned to addictions... so I would think this would be tougher to beat.
A trick I learned when I quit smoking was everytime I felt like having a cigarette I made myself stop and think why I would need one. It doesn't improve my health, it doesn't make me more attractive, it doesn't taste good and the "good" feeling that I think I'm getting is a drug that will eventually kill me. That 30 second conversation with myself has helped me be a non smoker for 4 years.
You will eventually find what works for I hope whatever path you choose is a positive one
Good luck and a big hug
(And if you go to Edgewood, say hi to my parents, they live on the same road
)