The last contact Forester had with Gardner, his girlfriend of more than two years, was a message from her around 3 p.m. on Aug. 2, saying, in part, "I love you, I care about you, we'll talk and sort this out when I get back."
The ABC News source says that message was sent with the intention of ending the relationship when she returned to Maryland, something Forester also disputes.
"Part of that message to me, prior to that, was, 'this sucks.' So I highly doubt that's what it was," Forester told "GMA." "Not to mention that our plan for the weekend she came home from the trip was to find an apartment together."
Photos taken of Gardner and Giordano just before she disappeared were obtained by ABC News Tuesday. They show her leaving the restaurant with Giordano. She is wearing a long dress that Forester said was her favorite dress.
The time stamp on the photo is 4:12 p.m. on Aug. 2. Surveillance video shows Giordano back at the restaurant at 6:02 p.m., trying to alert people that Gardner had vanished.