i think yes she does....
I think she does, too.
She probably does like you.
I'm in 7th grade too.. well, going into 8th. I saw that kinda drama, and I thought those guys that did the same thing that you did were douche bags. However, the Karla girl obviously likes you more than the other girl did, so I don't think it was nessisarily an ass hole-ish thing to do by dumping her. You obviously have more feelings for Karla than the other friend too. If she has the dedication to call you every single day then she most likely has feelings for you.
By the way, "friendship books" are cliche and cheesy. Just saying;)
She likes u