Is it possible to overcome drug addiction without rehab?

I don't like the whole purpose of "spirituality" that comes with rehab. Something about it sounds like a cult. I would at times go months and months without drug use. I would even stop smoking marijuana for months on end. Completely stopping all drug use. I do like a sense of community who always goes through the same thing but I don't like the "higher power" or depending on a deity to help with drug addiction. Sure, it can help other people but to me it just doesn't work out. I did try to go to rehab but something about it just seemed off and strange. It was filled with religious stuff and I'm mostly not religious but I do get inspired by Buddhism to quit drugs. I feel like it can fog the mind.

I have a mild addiction to any drug. I had nitrous binge last year and my mom caught me inhaling balloons. I would later feel disappointed in myself to make her so disappointed in me. So, I swore to never do nitrous ever again. It was a lot of nitrous . I would also binge drink and smoke tons of marijuana. After that, I stopped using drugs and alcohol for 4 months. I went back on the weed. Stopped again and then used marijuana again. This time I would smoke pot and smoke Salvia. I would smoke Salvia quite frequently, everyone sees me weird for enjoying the dysfunctional highs that comes with Salvia. I would also abuse benzos like Xanax and Kloponin by taking WAY too much at once and I would lose my stuff often. I lost my phone for 2 days after binging Kloponin and I find it all wet near the laundry machine. I don't know how the hell it got there. I would abuse opioids as well. I did lots of Vicodin. I would do 5 pills all at once and it felt so nice. I would finish the whole bottle of Vicodin in 2 or 3 weeks. After that, I did some Kratom to ease the opioid withdrawals and then I stopped Kratom. I haven't done a single opioid in months. Pretty proud of myself for not taking anymore opioids and benzos for months on end. I do at times still get cravings for more but I don't seek any people if they know anyone that sells them. Last time I took both of those drugs were in September. I haven't gotten drunk in almost a year. With pot, it's been a week without use. I did however smoked Salvia 3 days ago. I haven't done nicotine in awhile. I don't even like it anymore. It makes me feel dirty.

TL;DR: I have done numerous drugs and I don't like the weird cult like feeling with rehab with "spirituality" and "higher God". Do anyone here have gotten sober without rehab?