Your friend is probably feeling quite hurt and rejected, and has no idea that you feel so bad about it or why you didn't reply after she said she was disappointed and upset. Can you send her a message to explain what your thinking was behind everything and to let her know that you've been feeling really awful and don't want to lose her friendship? In trying to give her space and her not wanting to meet in person, it might be that messages you've sent have sounded like you don't care, even though that's not true. Try reaching out again via message to say what you've said here and make yourself vulnerable to her so she feels less embarrassed/rejected, and see where that takes you. You can then gauge from her response how to proceed after that - but if she's sharing her feelings, respond to them and keep talking so she knows you value her and her emotions