Ladies would telling her the truth be a good idea?

[212]

I tried to flirt with this girl on FB. She didn't seem interested so I asked her about the activist organization she is in. It worked I got her number and her attention.

Thing is now she is trying to use my interest in film to help her put on a film night at my school for the cause. My college doesn't have a chapter of the organization you see. Ice been playing along but I'm not sure if this is letting me get to know her better.

Should I play along and make a move after I help her put on the film night or fess up and just tell her I really kind her. Which I do I think she is really beautiful and nice. What should I do? Ladies opinion especially. Thanks