For me it was kinda different, For many years I was able to use opioids very casually, occasionally I would exaggerate pain or cough at a doctor appointment and if I got prescribed some opioids I would get high off them but after I ran out I wouldn't try to get more. Sometimes I would buy a small amount of heroin, use for a couple of days and then not buy more for months or even years. What actually started me down the road of addiction was my bipolar disorder, a very intense episode of depression to be precise. I was in a state of such intense agony that I decided to start using heroin to combat the mental pain, I was so desperate that literally just did not care anymore, I started using it from first thing in the morning to last thing before going to bed everyday because it just made being alive so much more bearable. Getting up to go to work became so easy, and work itself felt so effortless, not to mention that I didn't have to deal with any muscle soreness or back pain anymore from working. Doing chores and taking care of responsibilities was so much easier too, and I could feel so much more enjoyment from the things I love to do like drawing, playing video games, reading, etc.
Of course, the inevitable happened. I ran out of heroin one day, and I started feeling sick. The whole denial phase literally lasted a few hours for me, at first I thought I had just overexerted myself because I had taken a long walk, but some time later it was time for work and I was struggling to get ready for it, and though maybe I just had a small cold but I still went, and by the time I got off work I felt like I had a really horrible flu, and then I finally had to accept that I was in withdrawal...worst of all though, I was back in full force depression and it made me feel so apathetic that I didn't even care that I was now technically an addict, all I cared about was getting more heroin so I didn't have to feel depressed again. From there it's just rinse and repeat and here I am today, I just got my hands on some more heroin this morning and now everything feels ok again. So far, no one around me knows I'm an addict and I hope to keep it that way for as long as possible. At work I already overheard the manager talking with one of my co workers about a previous employee who was a heroin user and the way she talked about him makes me feel pretty certain that things would not go well for me if she found out I was an addict, and my family...well, I already struggle a ton with getting them to understand mental health issues, if they found out I was an addict then I highly doubt that they will try to be empathetic or understanding, especially because they have pretty negative views about drug. Basically, this is the only place I can really be open about all this...