Tell her straight in her eyes that you respect and loves her just as a friend nothing more. dont make it complicated. if she think/expect more than this tell her that you really cannot help her. not that you are not interested and flatered as a man, but you just dont want thing get into wrong way if both of you choose the other way. so better stay friend and still have fun. please use your normal tone and relax when you have this conversation. and if she doesn't get you, give her a time to think what you said and tried to explain to her again later if necessary. but smart woman dont need 2nd explaination. and you have to remember yourself not act or give any signal about the other way.

hope it does make sense my theory. other people might can help. or comments me... hihihi

Everybody is right and Everybody is wrong, its depend where you stand