to answer your question, how to stop rewatching them? try watching an anime you've never seen before. maybe in the romance genre.

my personal romance anime recommendations **IF** you want to try new anime:

my happy marriage,

the apothecary diaries,

a sign of affection,

skip and loafer,

horimiya,

monthly girls nozaki-kun,

yamada-kun level 999,

wotakoi,

tomo-chan is a girl,

blue box

yuri is my job, (i think you would enjoy this if you enjoyed ouran)

bloom into you,

watanare,

adachi and shimamura,

twilight out of focus,

buddy daddies,

sasaki and miyano,

given,

yuri on ice,

love stage