<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
There's a really ugly boy who likes me. How do I tell him off?
<|assistant|>
You could say that you appreciate his friendship but that you aren't romantically interested. Or, you could be honest and say that you don't return his feelings and tell him that you hope he finds someone he is more compatible with. Being direct but kindly can often diffuse situations.