lovestruck
adjective
love·struck ˈləv-ˌstrək 
: powerfully affected by feelings of romantic love for someone : deeply in love
a lovestruck teenager
… a scandal that began with a lovestruck Valley Girl gossiping to her treacherous friend …
Nancy Gibbs, Time, 22 Feb. 1999
Nancy Gibbs, Time, 22 Feb. 1999
Word History
First Known Use
circa 1652, in the meaning defined above