FAWN

to flatter or praise excessively

try to gain favor by cringing or flattering

"It was sickening see him fawn over her."

"He didnt realize it at the time but this kind of fawning was counterproductive with most women."

"He knew by the way that she would fawn him that she was in need of a favor."

"It was rare to see someone who was normally quite reserved and disinterested fawn over someone the way he was."