Why is this person that I know saying nothing makes him happy other than his romantic partner yet was about to unalive himself?

He was not making sense. He was saying nothing makes him happy other than his romantic partner, he is not as happy as He used to be, he doesn't care about anyone but Becca, can't relate to anyone but Becca. He was about to unalive himself but changed his mind. If nothing makes him happy other than his romantic partner than why was about to unalive himself, he would have left his romantic partner if he did that. He is not making sense.

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Hello?
Why is this person that I know saying nothing makes him happy other than his romantic partner yet was about to unalive himself?
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