Could he have a girlfriend ?

I met this guy at work who was very attractive . He is from another country. None of my colleagues knew him ( big work place ). He got my number at a work party but did not pursue me . He added me on snap chat and asked me out . He took me to a really nice place and paid .BUT he said he needed to take things slow with me, I shouldn’t rush . I said I would like to date someone consistently etc get to know them , be said ok let’s just be friends, I just left it .

So I accepted he is not that into me etc.My guy friend brought up whether he thought he could have had a girl back home . He thinks Snapchat is used to conceal messages. When I asked this guy if he was single he didn’t respond . His Facebook is very private and he doesn’t have Instagram, despite having a lot of pics of himself . He is the only one in his friend group not to have it My guy friend thinks it’s odd he goes back home so much , every other weekend .
This guy doesn’t speak to a lot of work collegues and doesn’t mix with them . No one knows anything about him really and he has been there for years .

Does it sound like he may have someone back home ? Or likely as I thought not interested?