Does This Girl Like Me?

[Sarah!]

(Girl A)- Is the girl I think has a crush on me
(Girl B) Is the messenger for (Girl A)

*She constantly is asking for help with her homework but when I end up trying to help her with her homework she can do it without a problem.

*Her friend asked me what kind of girls I was interested in and once she was done she went back over to her group of friends with (Girl A)

*Our school dance is coming up and all of (Girl A's) Friends have been asking me who I was going to take.

*(Girl B) yesterday texted me and said that she saw me checking out (Girl A)

*(Girl B) came over and said that (Girl A) Liked me but she was giggling when she said it.

*I asked a girl named Anna to the dance and once the night of the dance came (Girl A) never showed up.

*On Facebook (Girl A) posted a story of how she was tired of being the second girl on the list. She kept ranting on how she wanted to always be number one on the list.

*When I texted her and asked her about her post she ignored me.

What is up with her? She keeps giving me mixed emotions. BTW were only in the 7th Grade. I am not familiar with the signs of her liking me because she is only the first girl that may have had a crush on me.