If I'm being generous then They were together for six+years from 1998-2004, 5+years from Rebirth, so that's 11 in total. She was dead from 2004-2008 and Batgirl was 2009-2011, but 5 years not new 52, so 11 years apart. So it's roughly equal.
And those instance wasn't referencing their old relationship, it was clear they were still in love with each other, and Tim even said it at the end of the Robin 1993 series.