Do you think this girl likes me? BEST ANSWER GETS MAXIMUM POINTS!?

This girl I really like makes me very shy and I hardly ever talk to her. Well, anyway, at the beginning of the year she told me she was looking forward to lunch and study hall with me but then I stopped sitting w/her at lunch after the first day because I felt shy around her. She used to ask me a lot of questions and smile at me all the time, but now that I've ignored her so much that has gone down a lot. On Monday, a friend of the girl I like asked me if I wanted to go to a movie on Saturday with her, katy, rebecca, and a few others. I found it odd because I never talk to this girl or anything, and she is a friend of the girl I like. Well it turns out the "few others" included the girl I really like. Now Thursday at school, the girl I like said "So you're going to the movie on Sat? Well I'm going too, with Jerry(her friend) and then she said "So you're going with Stacy(the girl who wrote me), what's going on with you two? Do you like her?" As she was saying this, she was kicking my feet and smiling and staring at me as though judging my reaction. I really didn't say anything and she said"Oh, you do like her, I'm going to set you two up and everything." Do you think the girl I like is just trying to see my reaction? Also, isn't it kind of weird that the girl I like happened to be one of the "few others" that were coming to the movie? I thought it was a set-up, but then the girl I like decided to not come to the movie last night and I texted her and asked why and she said"I don't have any money, but have fun with Stacy." Does she think I like the other girl? I went w/Stacy and another girl and another guy.What do I say if she keeps up this this thing acting like me and Stacy are dating or something. Why does the girl I like take Stacy asking me to come along with a bunch of other people to a movie as a date between me and Stacy?