What should I do? ? RehAb?

Ok so I'm about to go to college and I think I have a drug problem... I'm scared but I don't want to admit it because I'm embarrassed and feel ashamed due to my parents. A month ago I overdosed and was rushed to the er via ambulance .. My heart stopped. I had taken adderall, Xanax, hydrocodone, and smoked pot. I've done cocaine before, other benzos, other stimulants, antidepressants, antipsychotics, ambien, and more. I haven't smoked pot since the incidence but I think about and dream about drugs all day, every day; it's starting to scare me. There's not a day I don't think about or crave drugs. I have reguraly taken Xanax for the past 3 years and I would say I'm addicted to bars. I'm scared of weed after what happened but I still want to smoke again. After the incident, my parents and school made me go to a drug counselor psychologist who wanted me to go to drug and alcohol rehab. I drink everyday too, usually 5+ drinks that include vodka. Drugs and alcohol make me feel powerful, special, and rid me of my anxiety and also make me feel more sociable. I talked my parents out of rehab and essentially manipulated them not to send me.. My school administrators advised them to send me too because I came High to school every day and really didn't care but I still managed decent grades. My parents still listened to me and didn't send me to rehab but now I'm starting to regret that because I'm beginning to realize and think that I might actually have a problem. And after nearly losing my life to drugs, I'm scared for college and losing control. My family has money and I think that's a contributing factor to my drug problem because I know I really don't ever have to work for anything but at the same time I don't want to be the stereotypical trust fund stay at home and do nothing. I want to be productive but at the same time I like being with my friends and partying. Lots of my high school friends have been to rehab amd went back to partying when they came back w the drug