I've decided that I finally want to stop using drugs.
I'm happy for you. What made you come to that decision?
It has caused a lot of problems in my life.
It is good to recognize that problems are occurring in your life because of drugs. It is recommended to go to rehab if you are having struggles.
I think rehab might be a good place for me, because I don't think I can do it alone.
It's important to recognize when you need help, and there's no shame in asking for it. I think getting into a rehab facility would be a good choice for you, because getting off drugs is no easy feat.