You're only going by pictures
Pictures and they had admitted that they were an item, this was like 2006 or so.
Pics of them kissing, holding hands or arms around waist, heads all close together. Yeah, ok...
Regardless, if someone showed pics of you and some woman with you, with the decribed actions, one can deduce that the two people are at least intimate---or comfortable enough with one another.
Especially with them kissing or holding hands.
There is diff between just taking a pic with some random chick, vs taking intimate/ or pics with a significant other... You can see the diff, and you know that.