Transference can never be fully resolved, especially whet it has to do with deep attachment. This attachment comes when the therapist is a good fit, and it represents the person who you see as your ideal self, and the one that you have been missing all your life. It becomes harder when you feel that the therapist cares about you (genuinely or not), and you can not be with her. So yes, when genuine feelings are involved, it becomes much, much harder.

Thus comes the idealization, admiration, love and pain. It breaks you even more, it can be traumatic, leading to suicidal thoughts. You forget the initial reason why you started therapy in the first place, it becomes your main issue. You feel nothing, but sadness. You get trapped in this spiral of suffering and it becomes impossible to get out.
This is the sad truth. I am talking from my own unfortunate experience .