question about a girl and Facebook's friends box?

[J]

I have this girl i'm talking to, and we're friends on Facebook. However, i notice one guy constantly appearing on her friends box. It wouldn't bother me so much except i noticed she liked a couple of his photos on instagram. Now to be fair, this guy and her have been facebook friends for 3 years. She just got divorced a few months ago, and she and I have been talking for a couple of months and there has been some physical romantic contact, just shy of any sexual contact. However, I can't get over the fact that he appears on her box, especially at nights it seems, coupled with the fact that she and i have not spoken for three days as of this question. Should I question her motives and suspect something?

[mariana]

The fact that he is in the facebook box means absolutely nothing. Facebook just randomly places certain friends there and most of the time they are the same people.It does not mean she put him there because she wants him to appear on her profile when people open it up.
Also liking his photos on instagram could mean different things depending on what type of pictures they were. If they were pics of his face then maybe she might be attracted to him. Personally I do not click like on males 'pictures on facebook or instagram nor do I look at them but I think when some girls do it it either means they are attracted to the male or they are just friends and like the pics.
I would say that she is just good friends with the guy. The fact that you and her once had some romantic interaction must mean something unless she is the promiscuous type who won;t settle for one person.