I seem to be a minority here.I am not too upset by his despo behaviour.
He had been getting positive signals from her for quite sometime he perceives her reactions as nervousness or shyness.
His persistency is the only key that is going to unlock her.That's how he has been right from the time of their engagement that's how he managed to replace J in her mind with him.
That happened because she forced her self to accept him and his overtures despite them reminding of her past.Him being persistent. That's how they came so far.
If he gives her time and backs off she will never be rid of those memories.Those memories have to be removed from her.I think it is her persistence and her voluntary acceptance is the only way for them to move forward IMO.