Who Are the Couples in The Show?

Presently, there are no Official canon couples in the show.
There have been plenty of fan-matched couples that 你 could look for, though.

Well there is Mr and Mrs. Cake that are married but other than that, there are no real couples but 粉丝 made couples like Lyra and Bon Bon. The ponies really don't have sexual orientations.

Princess Cadance and Shining Armor,
Mr. Cake and Mrs. Cake,
Pinkie Pie's Mom and Dad,
Rarity's Mom and Dad
Twilight Sparkle's Mom and Dad
Jet Set and Upper Crust