Why does my crush always go offline when I'm online on facebook?

[Lindsey]

So I like this guy but we barely even talk. But whenever we are both online at the same time after a tiny bit of time he goes offline. Is he trying to avoid me?
ps. We see each other every day

[Sofia]

Yes, he is avoiding you like the plague

[Jess]

Could just be a coincidence, try talking to him, just message him and say 'Hi'

[Hyo yeon]

We'll if you two barely even talk, why would he avoid you? does he know about your crush on him? i think you're just thinking to much, might be coincidences

[Apple]

co-incidence thats all ..try talking to him and see if he goes offline again in between a conversation ..well if he does then I guess ...you got idea.