How do i know?

Im not really one for big realtionships, i preferr to not get to close but there is one girl who i really do like and she knows me probably as well as any member of my family.

I recently moved and havent had the internet connected or phone line connected ( no means of communication + i can only acces sythe at College) sicne then i have gone on facebook and messaged her a few times (using college internet) and i havent got any replies and if i have they have been really short.

Im starting to think she doesnt like me now. How do i know? i dont want to bring it up with her incase she explodes and tells me to get fucked.