Ignoring Someone as Wrongful Speech

I am in an odd situation. Someone I know, who was my friend, now seems to have developped feelings towards me. I wish to give her space, but we are in contact electronically and text. She is extremely distraught by this situation. I cannot help but feel angry when she messages me, for various reasons. I feel that sometimes, the best answer for me is to remain silent. But in doing so, she feels ignored, and suffers. **What is the best course of action in a situation like this? Is ignoring someone wrong speech in this case?**