He's cooking dinner for me at his apartment... What to wear?

The guy whom I recently started dating is making me dinner at his apartment, and I have a feeling it's going to be really romantic. But I don't know what to wear... I don't want to be too casual, but I also don't want to be uncomfortable. Suggestions?
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I was thinking a soft, off-the shoulder top and a pair of nice, dark-wash jeans..?
He's cooking dinner for me at his apartment... What to wear?
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