Fact: Killian Jones loves Emma Swan. He was pretty sure he loved everything about her and eventually set out to prove it to himself. He was never quite sure however when proving his theory went from a practical and logical plan to determine his feelings to a full blown habit or addiction of stating his love. (In which Killian is sappy, Emma has tattoos and there are many feels).

When Killian is mysteriously transformed into a dog, no one in Storybrooke can change him back. It's not all bad, being the Savior's pet instead of her boyfriend, but as Emma begins to spend less time with her family and friends, and more time with the three strange newcomers, being a dog instead of a man has its disadvantages. Captain Swan, mild spoilers for season 4B.