wear one's heart on one's sleeve
Make one’s feelings apparent.I showed my feelings and wore my heart on my sleeve....- Happily, events on the park were a fitting tribute to the man who always wore his heart on his sleeve and played with a passion too often absent from the modern game.
- He carried a bunch of no-hopers for years; he is a terrific motivator; he takes no guff from authority; he told Sir Alex where to go and was proved right; and he was a great player who wore his heart on his sleeve.
See parent entry: heart