Does he secretly have a gf?

[me]

This guy has been taking me out lately so I did some facebook stalking lol. There's no relationship status on there but he has a lot of pictures with this one girl whose pictures are 80% with him (including her profile picture). Some of them were taken like 2 years ago and some recently so obviously they have a long-term thing

He moved here from Hawaii and I saw the girl went to the same Hawaiian highschool as him and now lives in our state too, so maybe they moved together? But she lives a few hours away.

Btw this guy doesn't know I saw his facebook I was just creepin, I'm not gonna bring it up or jump to conclusions but I'm curious if it sounds like he's taken to you?