He will be happy to get all the mint chip, and anything else he forgot to being to the angsty info dump.
That question was actually one ofnthe ones he didn't want to answer. There was a small part of him that recognized the fact that he could easily manipulate the situation in his favor. He wasnt that kind of person, so he had to tell her. If there was any chance for him and here at all, he had to tell her. Afterall, that was the sort of behavior that ended it for Oliver.
"You were in love with Oliver and I wasn't going to stand between you. Ra's al ghul stole his idenity from him, so there wasn't any reason he couldn't be with you. It's...that's arguably the cliff notes version."