"Are we over for good?" "I'll order pizza for u so you don't have to cook. I guess ur done, huh?" to her last text which only said "Please".
Good time to reply...
Answer: "Yes, we are over for good and I am done. It just isn't going to work between us and I see that now. I don't know what I was thinking before. I'm kinda seeing somebody and want to see where it goes with her." (she opened the door for you here because she TOLD you to date. You are giving her exactly what she wanted)
Don't offer any more information than what I told you. You MUST convince her your interest is in someone else now. Don't backslide.
Then leave her alone. Let the jealousy factor come into play. This should spark her curiosity and ignite the jealousy button if she has any feelngs for you and get her to finally wonder IF SHE HAS SCREWED UP. (exactly where you have needed her to be for a long long time)