So this guy I have been dating is on facebook and..?

I just noticed another girl he is friends with whose description of their connection together (among other things) says they have bee dating for years and are practically married. Does this qualify as something I should um, bring up? plus it shows that I was looking through his facebook friends. and more importantly how do I broach this? This could be an old descrption he never changed or even a joke...or it could be he is a slime. help?