I use mine during work hours, right before bed, and toilet time. After that I sometimes forget where it is. I don't take it with me into places like movies, restaurants, ball games, etc
If I were to lose it today I'd consider getting a replacement in a few days - maybe a week. I do text wife and friends but I'm at the point where if my phone beeps I'll get to it whenever.
While I do have it with me at all times and use it regularly, I am always able to put it down and focus on whatever else is happening. It is used to fill in the boring parts of the day, and sometimes I just don't use it for a day or two even if it is with me.
I do get nervous when it is away from me, but that is because it seems like I am most needed when I can't be reached.
Also gen X and still remember when I missed out on stuff as a kid because I wasn't around a land line.
While going somewhere I usually listen at music at least, might read/write messages or uncommonly play a game.
Might read/send messages wherever I am, when convenient.
While going somewhere with the bicycle I usually listen at a podcast, call someone or listen at music.
When paying bills or otherwise dealing with moneyz, I use the two way auth on the phone.
In the evening, usually at bed, I do three diaries and then go to sleep.
I think "integrated" is a better term for my usage than "addicted". My phone is an extension of my digital presence, and although I work from a desktop computer day-to-day, my phone is an integral part of my ability to automate and operate my tools, hardware and software. Besides work stuff, it's also fully integrated into my home life since it's my interface for my home automation as well as my primary means of staying up to date with news and info I need.
But I don't really play phone games, and I don't do social media (other than KBin at the moment, anyway), so I don't find myself using it in an addictive way too often.