I pay $5/month for 5G on my Apple Watch and leave my phone at home. The watch is good enough for phone calls, especially with a pair of AirPods.
If that sounds too scary for you, consider leaving your phone in your car while you hang with your friends.
[1] https://taylor.town/leave-your-phone-at-home
You can also disable notifications. My phone only notifies me when I receive phone calls. I manually check it for everything else.