Zoey/mark/ryou

Does zoey like ryou? What was with her in ep 18? Is she starting to like him the titel of the ep is swaying hart-, hart so does she developed some feelings for him and forget about mark? I read on mysnimelist she is confused about her feelings alot r they talking about mark and Elliot? Also Is she disappointed when she finds out Elliot inst the blue night and if so why? I can't believe she is going out with mark and likes ryou at the same time Lol poor mark he is so innocent and good to her? When she finds out the blue knight is mark is she happy?