I did, our house just 10m away, imo most beautiful girl in neighborhood, went to same school, for some reason I did very hard study and always get rank 1st~3rd on class to get her attention, teach her and doing homework together, I stick to her almost on every single chance but didn't realize its a crush (I was 7, I just felt happy near her), then we went to different middle school and I never actually can confess (my parents heavily warn me not getting girlfriend, and it's impossible to hide girlfriend next door, I did get one on last year of middle school tho 😁)
Years later, she got pregnant & married with guys without fixed jobs, got very thin and looks suffer. (yeah, it's common to force marrying a girl by making her pregnant here, so their parent can't refuse, their worth plummeting and nobody will Marry them otherwise). Her sister also married bad guy who got imprisoned because selling narcotics.
Later, My mom who have 5 boys and her mom with 4 daughters, once gossiping around on neighborhood meetings why none of their children dating each other. I was like "wtf mom! "