Wow, that boyfriend prank. I played no prank on mine, since tomorrow is mine and his's three month mark, and I really didn't want to piss him off. I did tell him that my "friend" was mad at me. And when she gets mad, she goes after their boyfriends and tries to sleep with them. Yeah, no April Fools there.
But I did get two of my friends by saying that me and my boyfriend broke it off. Scared the daylights out of one of them! Then she used it on one of my other friends, and still believed her, even after she said, "April fools!" She came up to me at lunch and asked me about it. Dumbass. lol