That "rumor" didn't get much attention anywhere and was brought up here and on OH by an anti who attributed it to YoonGi. I agree, we should just ignore it. It's not really a rumor confirmed to be about them in the first place please remember. Of course there are other people who fit it. Yoona is not the only person in the world who has failed dramas who is in a relationship.
Anyway, let's continue supporting them.