Hi,
This is not a moral issue, it is a medical one.
It sounds to me, who is not a mental health professional, that your brain is craving the chemicals you used to get through drugs, and thrill-seeking is filling that void. You know that lots of chemicals are released in your brain when you are jumping from an airplane, or driving fast and recklessly. You definitely need to see a psychiatrist, because your quest for these chemicals can kill someone, and then you will be in prison, and you certainly won't get either the medical care, or the thrills.
And although I think 12 step programs and talk therapy will help you a bit, I really think you need an MD, psychiatrist, to evaluate you and prescribe proper meds to calm your brain down, if he/she thinks it will help you.
Best of luck,
Nancy