I understand that this situation can be difficult and emotionally challenging for you. It's essential to respect her feelings and boundaries, even though it might not be what you want to hear. Here's a suggested reply that acknowledges her decision while expressing your feelings honestly:
"Thank you for being honest with me. I understand and respect your feelings about not wanting to communicate again. I want you to know that I still care about you deeply, but I also understand the importance of giving each other space and time to heal.
If you ever change your mind and feel like talking, know that I'll be here. Until then, I'll respect your decision and work on moving forward myself. Take care."
This response shows that you respect her wishes and are open to the possibility of communication in the future. It also gives both of you the space you need to focus on your own well-being. Remember that healing from a breakup takes time, and it's essential to take care of yourself during this process. Surround yourself with supportive friends and family, engage in activities that bring you joy, and focus on personal growth.