Do I have to give away expensive gifts from my ex when I'm dating someone else?

My ex gave me expensive gifts. Cute lululemon leggings, branded purses, and like $200 preserved flowers. Do I have to give them away? I use them so often. Dont think about him much when I wear them, but very occasionally i do remember oh yeah my ex got me this. Ex was 8 years long relationship by the way.

Do I have to give away expensive gifts from my ex when I'm dating someone else?
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