You know the rules by now:
January: X licks you while you're asleep.
February: You and X make a unicorn made from sugar
March: You and X go for walk in a forest
April: X holds you
May: X tickles you
June: X holds you
July: You and X French kiss
August: You and X go snowboarding
September: X buys you a muffin
October: You tuck X in
November: You and X get married
December: You and X go back in time
I'll just mix the x's up a bit:
1.Sunshower Raindrops, 2.Doctor Hooves, 3.DJ Pon-3, 4.Octavia Melody, 5.Minuette, 6.Derpy, 7.Lyra Heartstrings, 8.Twinkleshine, 9.Parasol, 10.Rose, 11.Lyra, 12.Golden Harvest, 13.Amethyst Star, 14.Shoeshine, 15.Rainbow Dash, 16.Daring Do, 17.Princess Luna, 18.Applejack, 19.Twilight Sparkle, 20.Fluttershy, 21.Rarity, 22.Pinkie Pie, 23.Apple Bloom, 24.Sweetie Belle, 25.Shining Armour, 26.Princess Cadance, 27.Soarin, 28.Thunderlane, 29.Big MacInTosh, 30.Sunset Shimmer, 31.The Dazzlings (all 3)