They sure can do everything except confessing to each other
It's how it is in manga rom-coms-- heroines are prepared to do everything up to and including
commiting rape, before they'll confess their love for a man.
(To be sure, male leads are prepared to go the extra mile to do anything except say "I like you", too, but... usually not to the point of rape, since there ain't nobody trying to see that
except for the ones reading smutty josei manga)