Bruce Wayne was trying to get into Diana Prince's--um--good graces--in THE BRAVE AND THE BOLD 87 (December '69 - January '70).
And then there was that Nick Cardy cover for JUSTICE LEAGUE OF AMERICA 102 (October 1972), where everyone else had their eyes on Superman, but Wonder Woman (of Earth-Two) and Batman (of Earth-One) only had eyes for each other.