Board Thread:Spoilers!/@comment-4877635-20130614170253/@comment-6175354-20131017181634

Utter solitude wrote:

And now that I'm thinking about it, Belle said in "Skin Deep", "it's true love!" Not, "you're my true love!" ;) Not just that, Cora claimed to truly love Rumplestiltskin. Although, she loved him for all the wrong reasons.

Personally, I think this is why Rumplestiltskin was so scared to left Belle in, during Skin Deep. Cora's betrayal, really hurt him.