Is it normal that he slowly ceases to believe in unconditional love between a man and a woman?

I just think that these times are sick and people are often bad, selfish, they love money and popularity. I don't know, maybe I have a bad worldview but I think that love is either a rarity or modern people cannot love.
Is it normal that he slowly ceases to believe in unconditional love between a man and a woman?
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