Well for 18 y/o your beard is looking pretty average to me. You shouldn't feel bad about this at all and as I said previously, your developing beard has many, many years to grow into a very full beard. For now, wear what makes you feel good which is at least a goatee or chinstrap.  Keep growing and showing.  Oh, and let us know how long you've been growing your beard.

Library Central of Beard Growing... new beard growers check out Starting and Accepting sections

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My personal beard journey