hi Abby,
I agree with a lot of what has been said here and am not sure I can offer much more than support. I do want to say just by reading what you wrote that you are definitely not lacking an interest in trying to change...and I don't think you are getting enough support from your therapist.
I don't know if this means she is not the right therapist for you, but if so, she should be able to recommend someone better able to be supportive and helpful when you need it.
As also mentioned, other kinds of therapy could be helpful, too. Just don't give up on yourself...I don't think this is a "you" issue. You are not getting your needs met and someone needs to step up to the plate and be the person you can depend on to always be there for you.
Please take care of yourself and don't give up.