Board Thread:Spoilers!/@comment-6003903-20130501193619/@comment-5679696-20130501203433

She mentions in We Are Both the reason:
 * "I don’t know how to love very well. I wasn’t capable of it for a very long time, but I know, I remember... If you hold onto someone too hard, that doesn’t make them love you."

She was able to love when she was young, but Cora killing her True Love kinda traumatized her XD