You WANT to set the table so that YOU are able to tell HER later when she begs you to come back..
"Well, YOU said you wanted to only be friends. I think we make better friends than lovers."
This get HER chasing you and YOU using her own tactics against her later... Works like a charm.
So, you tell her yes to friends, and then get a NEW woman to be seen with.. She can NOT say anything to you about it. She already told you she only wants to be friends. Oblige her.