Guys, what would make you confess to a girl online but not say it to her in person?

Anonymous
My crush confessed to me on a confession page and asked me out on a date but in reality he just keeps staring at me and quickly looks away if I catch him. He also mostly stares at me from afar and gets speechless around me and looks down when we pass by each other. My friends have noticed that he's tried approaching me several times but then backs out. This has been going on for months.

What's weird is that he's a complete extrovert otherwise and one of the most popular guys in our college. So I find it hard to believe that he isn't able to talk to me or ask me out in person.

I'm wondering should I do something about his confession?
Guys, what would make you confess to a girl online but not say it to her in person?
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