Mckell, what might you be giving up in order to let this person care about you?
Sometimes we think there is a price for things; a price for love or caring for example.... do you relate to that?
Is it too scary to be cared for?
How would you relate to being cared for?
What is the price for letting T into your heart?

Maybe those will reveal some inner thoughts. I just got another workbook last night - the Borderline personality workbook. It is designed to have us look at our schemas and see why we think what we do - even while in "auto pilot".