… most of this type of discussion has already been going on in threads like
Could everyone stop saying they have OCD about their phones?
Well, that
is the uppermost similar topic, however its title is somewhat dismissive and ignorant – so I’m not surprised that some people turn off and and away without reading beyond the title. And so here I am

in this topic about an iPhone. Without an iPhone, but with an interest.
… assumption that it is a tool, that after 2-3 years it is end of life anyway (both due to processing and memory requirements moving on, and the battery life by that point being trash) and needs to be replaced …
I imagine using my 2015 YotaPhone 2 for five years or more.
… I'm more about the usability of the device …
Yeah. The more I use my device, the more I like it. It took me months to stumble across the swipe feature of the integral keyboard.
… first cracked screen … I just said oh well. In all honesty, it's just an appliance, one that does a lot for me … with the crack, my phone is so good …
Mine is neither cracked nor scratched, but on the Gorilla Glass side there’s a vague Z-shaped mark … visible only if I polish the glass and actively look for marks. The other side (always on) is unmarked.
… My phones are never in cases…
With a first generation iPhone, refurbished and gifted to me, I sometimes used a case. Ultimately the minor damage that the iPhone suffered would not have been prevented by any of those cases.
For the Yota device: every day I plan to buy the bumper case. Dropping the device, more than a few times over a few months, was never sufficiently alarming to make that plan a reality.
To the opening poster
… I'm being way too overprotective … don't use it much … because I'm scared of damaging it. I don't think I'm enjoying it as much I should be. How can I stop myself from caring about it so much?
If you have, gathering dust somewhere, something that you previously treasured:
discard that thing. Or gift it to charity, or a friend. The sooner you learn that a treasure is not forever, the sooner you’ll happily care less about the treasure that is
currently your iPhone.
If you imagine dropping the iPhone: stop imagining.
Know that it will be dropped; invest in a protector of some sort.
If you put the iPhone in trouser pockets: make front pockets a habit. (That’s my habit, but it’s often naturally forgotten. I find something breakable in a seat pocket after a long car drive, and so on.)
For myself, I’m now inspired to truly purchase that bumper case. It’ll be with me in a few days.