I'd be hesitant - it sounds to me like she's pushing very hard at the dating boundary. I've never known anyone to use the "if I've been patient, I'll be 'rewarded'" thing with respect to a friendship.
I may be wrong, but I'd be inclined to keep her at arms' length for now.
Mono. Divorced, two kids (DanceGirl, 14; and PokéGirl, 11), two cats, one house, many projects.
My partner. Poly. In relationships with me, Xena, and Noa.
Poly. In relationships with Chops and Noa, and dating others.
Married, Poly. In relationships with Chops and Xena (individually).
Blog thread: A Mono's Journey Into Poly-Land (or, "Aw hell, there's no road map?!")
Slightly more polished blog with a mono/poly focus: From Baltic to Boardwalk