be stuck on somebody
to be attracted to someone
stuck on
INFATUATED WITH, besotted with, smitten with, (head over heels) in love with, obsessed with, struck on, crazy about, mad about, wild about, carrying a torch for

[TahlilGaran] Dictionary of Contemporary English ▲

stuck on
1. • stuck on (someone)
to be very much in love with someone, to be crazy about someone
My niece has been stuck on the boy next door for several years now.

2. • stuck on (something)
to be locked into an idea/cause/purpose
The man is stuck on the idea of going to a hot place for his vacation.

[TahlilGaran] English Idioms Dictionary ▲

stuck on something
• stuck on (something)
to be locked into an idea/cause/purpose
The man is stuck on the idea of going to a hot place for his vacation.

[TahlilGaran] English Idioms Dictionary ▲

stuck on
slang Very much in love with; crazy about.
Judy thinks she is very pretty and very smart. She is stuck on herself.
Lucy is stuck on the football captain.

[TahlilGaran] English Idioms Dictionary ▲

stuck on someone
• stuck on (someone)
to be very much in love with someone, to be crazy about someone
My niece has been stuck on the boy next door for several years now.

[TahlilGaran] English Idioms Dictionary ▲