Absence makes the heart grow fonder? Or time heals all wounds?

Which is it? I keep hearing the expressions "absence makes the heart grow fonder", and "time heals all wounds", but they kind of contradict each other in my eyes. I mean does time apart from someone you love make you love them more? Or make you move on and out of love with them?
Absence makes the heart grow fonder? Or time heals all wounds?
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