He showed his affection for her by bringing her flowers.
fondness
Frequency:
25
%
She had a fondness for old movies.
infatuation
Frequency:
20
%
Her infatuation with him was obvious to everyone.
Idiomatic Expressions for sweet on
Phrase: sweet on something
Meaning: to have a strong liking or preference for something
Usage: She's always been sweet on chocolate ice cream, it's her favorite dessert.