While the sentiment is common and relatable, there's no single, definitively attributed quote that says "You can't stay mad at someone who makes you laugh." It's likely a saying that's been around for a long time and has been passed down through generations or attributed to various people.
If you're looking for a similar quote, you could try searching for phrases like:
* "Laughter is the best medicine"
* "A good laugh can cure anything"
* "It's hard to be angry at someone who makes you smile"
Let me know if you have any other questions!