he was uncertain of her feelings towards him. (if only he had listened to her begging him to come back to life.) and she wasn’t sure either, all she knew is that she couldn’t bear to lose him, she cares about him too much.
she can’t lose him and she needs him to know that, she wants him to know how important he is to her and how deeply she cares. she won’t lose him, he wants her to know that, too.