What does it mean when a guy has a 'No Relationship info to show" On his about me on Facebook?

Anonymous
Guy i like, facebook picture is of himself only, and his facebook super private and shows if " No Relationship info to show" But shows only his town/city he likes in.
one girl on his friends list has a picture of guy and her as her profile picture. Not really a couply picture. And her facebook doesn't show her "Relationship section either. and im not friends with her so her 'Relationship" Things private, but she has pictures with a few different guys in her photos

Soooo do u think they are in a relationship? not in a relationship?
Why is his profile picture of just him and not both?
Could they just be best friends?

And is there a way to ask wether he's in a relationship but it not be weird or too forward about it?
What does it mean when a guy has a 'No Relationship info to show" On his about me on Facebook?
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