haha neo is jokes. you should definately not hold her hand or kiss her. you have to be business like! tell her why youre leaving and leave politely. dont kiss show feelings towards her because thats not why youre there. youre there to show her what she could of had and now its over.
in the end i dont know what would be more funny. if you didnt go and had what ifs because a bunch of guys on an internet forum told you not to, or if you got back together with her.