The conversation between human and AI assistant.
[|Human|] Rewrite this sentence to make it more concise: The thing is, the reason why she's unhappy is that she believes nobody loves her.
[|AI|] She's unhappy because she believes nobody loves her.
[|Human|] 
Rewrite this sentence to make it more concise: The thing is, the reason why she's unhappy is that she believes nobody loves her.