Is there any way to let her know that I care about her without 'scaring' her away?
if only there was a simple answer to that question Victor85. and of course there's not.
generally speaking, people with BPD (or some of the traits of the disorder) are highly sensitive, and have harmfully intense emotions that change rapidly.
it's important to have an understanding and acceptance of the disorder and the challenges it presents. it's important to not get stuck in hoping things will return to the idealization phase of the relationship.
on the top of all the boards here is a "Lessons" thread that is pinned there. it's a good place to start learning.
I found learning communication skills and tools to make conversations more productive helpful.
https://bpdfamily.com/message_board/index.php?topic=69272.0 'ducks