How to fix mouth corner lines (20 years old)? (photos)

I'm a 20 yr-old Asian male, 125 pounds, ~11% body fat. These face lines started appearing since I believe at 18 years old. It's been difficult seeing my smile, especially at a further distance (where I would look plain/sad) The photos are where the lightings aren't really bright. When it's sunny, the shadows at the edge of my mouth are more noticeable, which makes it even harder to see my smile. I was wondering if there was something I could do at home (or at least inexpensive). Thanks.

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