Please help.. Crush issues?

Alright.... So i am friends with my crush on facebook and one of my friends noticed she liked a lot of my status updates.... So he asked her if she liked me and she said something along the lines of No and it really annoys me how he messages me all the time.. Thing is we get a long great and flirt alot. I have also told her that if i am bugging her she can tell me to stop and i will. Her sister asked me through FB if i liked her and i said no not really (i probably shouldnt have lied..). She made a :/ face (which is a disapointed face) and said lets forget all about it. But i asked her if her sister (my crush) likes me. She took FOREVER (a minute or two) to respond. Might not seem like long but she only said Not that i know of.... (sorry for no quote marks im typing this from my phone) after which i sent a message to my crush saying sorry. I just sent it so she hasnt responded yet. What do you guys think??