This information about the girlfriend may have sprung from a posting on TMZ's web site. They claimed to have spoken to 3 females from that "Adult Friend Finder" web site who said they were contacted by Holmes in the days leading up to the shooting spree, and they all turned him down. I haven't heard anything else about a girlfriend. The neighbours that were interviewed said he was a bit of a loner and never mentioned seeing him with a girl...
Link: http://www.tmz.com/2012/07/23/james-holmes-colorado-shooter-sex-adult-friend-finder-rejected/
Granted that's TMZ. Take it with a grain of salt.
Or maybe somebody thinks that semi-naked woman behind him in an AFF photo is a real girl. That is not a real woman behind him. That's a model and she never met him. He had a poster of her behind him when that photo was taken.
:floorlaugh: