obsessive
You're head-over-heels in love and can't stop smiling, even when you're being yelled at by your mom.
I've been in love with that pizza place since third grade. My mom still doesn't know why I passed up college for a job at the pizzeria.
He's been in love with that video game for six years. He still plays it every night. Even when he has homework.
She's in love with her cat. She even got a tattoo of it.