How did everybody know were Sir Lanelot was in love with a lady?

Sir Lancelot's love for Lady Guinevere was widely known due to his chivalrous behavior and public displays of affection toward her, which were often discussed among the knights and court members. His acts of bravery and dedication in her name further fueled speculation about their relationship. Additionally, the romantic nature of Arthurian legends often emphasized such love stories, making Lancelot's feelings a central theme in the tales surrounding King Arthur's court.