But I wanna just take this time out to be perfectly honest
Cause there's a lotta shit I keep bottled that hurts deep inside of my soul
And just know that I grow colder the older I grow

from Eminem – Hailie's Song Lyrics on Rap Genius

Meaning

Eminem was at first reluctant to release a song expressing the love he had for his daughter, Hailie, but after the prodding of Dr. Dre he did (he stated this in his autobiography, “The Way I Am”). The “shit I keep bottled” may be the love of his daughter, and “I grow colder the older I grow” about how he’s increasingly hesitant to release a love song for his daughter

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