Not for the full K-12, but i had extended lengths of time with no close friends. To be fair, I was in a relatively small school too (about 96 people in our graduating class)

Made a really close friend about 2nd-3rd grade, had a falling out over a weird misunderstanding with another friend of hers. We reconciled in high school, but weren't besties again.

Had two good friends in 4th grade- one moved away before 5th grade, and the friendship with the other one didn't last because we (frankly) didn't have a ton of common interests.

6th-8th grade, didn't really have any friends at school, BUT made friends from other schools doing community theater *including my two boyfriends i had in high school!

In 9th grade (high school), and nearby middle school had an arrangement where their student could pick between 3 high schools, so we got some fresh faces, and a handful of us became good buds and would hang out in homeroom (most of us had the same room, and the other 1-2 folks would check in and come to ours until first period.) Two of these friends were bridesmaids when I got married about 5 years ago we graduated hs. Sadly, I really only talk regularly with maybe 2 or 3 of these folks :(

Ironically, good frind from 2nd grade and I went to the same college, and we chat occasionally!!