What do I do about this girl please help?

So there is this girl I really liked, so I asked her to go to homecoming an them It got really confusing. So I asked her and she said she was already going with her friend Laura, but I could go with them. I don't know what to do. One dude asked her and she lied and said she has a softball tournament. After she offered she I said I am not sure and she said its fine if I felt strange. I don't know, she didn't reject me like the first two. What should I do