Simpsons Season 4, Episode 15: I Love Lisa

On Valentine's Day, everyone in Lisa's class receives a card, except Ralph Wiggum. Out of pity, Lisa quickly writes one up and gives it to him, much to Ralph's delight. Ralph begins to develop an interest in Lisa, but Lisa is not interested. However, she does not know how to get rid of him. Ralph invites her to go to Krusty's 29th Anniversary Special and she reluctantly accepts. During a televised talk session with Krusty, Ralph declares that he loves her and Lisa explodes and declares that she never liked Ralph.