Synonyms: infatuated, enamored, obsessed, entranced, hooked, lovesick, etc.
Definition of Lovey-dovey
very romantic, especially in public and in a way that other people think is silly and embarrassing
The newlyweds were acting all lovey-dovey. All my friends were either lovey-dovey couples or wild, single girls. But the lovey-dovey conversation didn't even dent readers' affection for the caring Princess. She was never a lovey-dovey sort of mother.