S15E12 Milhouse Doesn't Live Here Anymore
Milhouse's mother gets a job in Capitol City and takes Milhouse with her. Bart feels really bad about this and tries to find a new best friend. When Ralph doesn't fit the bill he and Lisa become best friends. It's weird but satisfying to both of them. Homer, who's at Moe's, realizes he hasn't got an anniversary gift for Marge yet. When he's outside (and totally drunk) he sits on the sidewalk and a woman gives him some money. He starts dancing and more people give him money. This gives Homer an idea to raise the money needed to buy Marge beautiful gifts.