The problem is though, I'm addicted to my computer. I'm not actually sure it's that much better.
Practice conversing and talking.
Socialising is a muscle, and smartphones (and other devices) are a crutch that lets us avoid using that muscle.
When we eat out we try to do the same but because of the damn menus, translation app, etc. the screens still come out. We still are usually doing much better than the other tables in the restaurants. Helps to turn the devil device face down.
We think it is just so sad to see people out on a date, or even a clearly married older pair, each staring at their (own) screens.
Then within those categories you have easier and harder games (and better made or less better).
Try a sampler platter and see what works and is fun.
Some specific suggestions:
Love letter, Takanoko, munchkin, elder sign.
Staying in touch with friends, finding new interesting people, browsing local events, deciding where to meet, etc.
The problem is when you are just "on the phone", not really doing anything, not anything you planned to do, and not really getting anything done. Even this can be fine, as long as you go "I'd like to see whats on twitter for half an hour", rather than just opening things up and doing them because the algorithm pulls you in.
There's nothing wrong with smartphones per se. It's that the smartphones become a crutch to avoid socializing in person. All the excuses come out to prevent that crutch from being removed.
Using a mobile is like reading while looking through a toilet roll, and typing by using a straw in my mouth :P
I often get questions from people on WhatsApp saying "How can you reply so quickly??". Well duh... I use a real computer :) Anything I can do on the mobile I can do twice as fast on the computer.
For me it just 'hurts' when my brain cycles are forcibly wasted. Not just with this, also with those stupid mandatory trainings in work where the narrator is so slow to make sure even the most mediocre non-native numbnut can keep up. It just frustrates me so much when I'm forced to listen to that (usually I spend my time looking through the javascript to find a way to turn off the non-skip setting :P )
I actually got caught out by that once when an intern noticed I had only spent 1 hour on a course everyone else spent at least 3 hours on :P But I told her I was on a plane so when I finished it I was in a different time zone :D
Unfortunately even if you run a FLOSS OS you run on crapload of proprietary fw down to the CPU but again, you have some ability to move and act, on a mobile you are just free to do what the OEM decide you are allowed to, with it's right to change policy as it wish.
Technical books are better on larger screens, so the Kindle only gets used if I read that kind of book. Though the Kindle has way too few pixels imo, so I often read these on my desktop or ipad too.