Why would someone not tell you they love you, when its clear that they do?

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7 mo
I have been asked this question two times now. Both dealing with the passing of a loved one. One a young would be couple. The other a child missing their parent. I don't have the words to answer this question. I'm hoping someone here can grant some wisdom I'm desperately lacking.
Why would someone not tell you they love you, when its clear that they do?
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