It has been thirty-five days since the official dissolution of your relationship with Kitty, yes, but I don't think that was when it truly ended... and I don't think that she has moved on so quickly and thoroughly as you imagine. [She certainly hasn't from his perspective.]
Maybe it would be more productive if you were to discuss this with her. She wants to be your friend... you don't need to lose her friendship, and maybe it would help both of you to talk.