Would be weird with Jon being 10 anybody declares he and Damian are in love. I think best friends or brothers is the best mach for 10 years 13 years boys relationship.
Couples change so fast some times, like, I got Red Arrow becoming in love for Kid Flash, but when he liked she back was suddenly. And also how he and Raven became together and broke up was so bad wrote.
Raven and Damian in movie was a lovely couple, but there is no indication they like each other in comics too.
How a character feel about each generally is more well done in movies than comics.