A shy guy needs a little help.......?

Sure you can have a little confidence!! You don't even no if she signed off because she was bored maybe she was busy. Next time you talk to her ask her about what SHE is doing not school I am sure she would rather talk about other things. DO NOT spill your guts out you will come across as needy /creepy and no girl wants to deal with that. Just talk straight to her like "What are you doing this afternoon?" something simple yet she would be interested in responding to you.