Shy guys: do you self sabotage?

when it comes to a girl you like, do you sabotage your chances?

If so, how do you do it?

Ex: If you're attracted to a girl, and she sends you a Facebook message will you not respond?

Or is that your way of showing her that you're not interested (even if you do pretty much all the other shy guy signs of attraction when you see her in person)

If you like a girl, and she starts showing interest will you get scared/anxious and ruin your chances?

Updates
+1 y
He did reply, but not until the day after, is that a good or bad sign? The message was sweet though, a lot of laughter and he used a few words that are only found in my dialect (in real life he does the same, says words and sentences in my dialect around me. started doing that a few weeks ago).

I'm assuming he knows I like him but I've never actually said it.
Shy guys: do you self sabotage?
Post Opinion