My coworker maybe likes me but I think he has a girlfriend?

[Laila]

I recently wrote about a coworker who I think likes me and I (think) I like him too...but I am never sure about these things!

Anyway so I added him on a social media site and saw that he is not in a relationship (as told by his page) however he has several recent pictures, like within the last month, of just him and another girl and it looks very much like they are dating! So now I am confused about what's happening and probably that I am an idiot and he was just being nice to me... I'm wondering if people who are in relationships don't declare it on social media sites for a reason? Like, maybe it's an open relationship or they are just friends? There are no scandalous pictures, just friendly ones of them going places and hanging out....I don't know, I'm super confused now...and a little bit disappointed! Please Help!