She left him and pregnant by him. I found her engagement ring in his closet. Why is he holding on to it?

They've been broken up now for 4 months. Shouldn't he get rid of her engagement ring? Aren't men supposed to pawn it or something? It's a small ring I can't fit it.
She left him and pregnant by him. I found her engagement ring in his closet. Why is he holding on to it?
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