To express affection or sentiment too openly or ostentatiously: “You have to play it cool with a girl like Heidi; you mustn't wear your heart on your sleeve.”
Learn more about wear one's heart on one's sleeve
Browse entries near wear one's heart on one's sleeve
wear away
wear down
wear down (idioms)
wear off
wear off (idioms)
wear one's heart on one's sleeve (idioms)
wear out
wear out (idioms)
wear out one's welcome
wear the pants