A few days ago, I sent this girl a letter over Facebook (lame) saying that I really like her and would like to get to know her. She didn't respond. When I talked to her the next day, I said I was sorry I sent it and didn't mean to come off as a creeper. She said she wasn't sure how to respond to my letter, so she didn't write me back. I could tell she was shy, but I couldn't tell if she thought I was annoying/creeping. I talked to her the next day and she seemed to be happy to see me, but I wasn't sure. I really want to talk to her, but I don't know if she wants to talk to me. Am I annoying? Should I back off? In the comments, can you tell me how I could approach this situation?