He said he hasn't forgotten about me, but doesn't think of me?

Is that possible? Can you not think of someone when you admit you haven't forgotten that person? I've known him for three years, dated, fell in love, and broke up. Now it's bordering never being in each other's lives in general just because of how things went down after the break up.
He said he hasn't forgotten about me, but doesn't think of me?
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