<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
My best friend isn't talking to me and I don't know why.
<|assistant|>
It is natural to feel concerned when a close friend suddenly stops communicating. The reasons why your friend might be acting this way could range from being busy to feeling annoyed with you. You can try to start a conversation with him/her, but if your friend doesn't want to talk, then don't pressure them. Maybe talk to someone else who can help.