How can you tell that your significant other has lessened his/her love for you?

We know that in a relationship, especially long ones, are not always hearts and flowers. There will come a time that laughter will become silence. Not because you're cold at each other but because of life's circumstances. Some people usually mistakenly think that love has lessened. If it does, how can you tell?
How can you tell that your significant other has lessened his/her love for you?
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