I did 24/7 for about 18 months while I was in a long distance relationship so my partner wouldn't notice. I lived with a female flatmate, cute artsy type. There was no lock on the bathroom door so she came in a couple of times while I was brushing my teeth in a diaper and t-shirt. She must have seen or noticed me wearing around the flat I think though she never said anything.
I wore to work every day and just tried to be as discrete as I could.
Just to be clear, I'm a very normal guy, well paying law job etc.
I miss it a lot now. It took me a few years into adulthood to get the balls to just wear whenever I wanted. I wish I'd have figured it out much earlier.
I generally lurk only for the diaper girl pics but just wanted to chime in and say, particularly for anyone who is normal/good looking and a young adult. Just wear as much as you want and can. You only live once so just go for it while you're cute and girls aren't gonna think you're a weird old dude.
I don't feel I can tell my long term partner. I know from things she has said she wouldn't be into it and it was a factor in ending my previous relationship when I opened up. Another tip. If you want to open up about it, do it early on. Make it lighthearted, jokey while it's in the early relationship phases and noone is super attached to the non-diaper wearing version of you.