In the dark represents where you are mentally and emotionally. By feeling sad and lonely, you are basically in the dark, and with lines like "it's hard to see", it can mean literally but it mostly dives deep metaphorically as the next lines are "what others see, what they think of me" meaning if you are isolated, you also won't know what others think about you, what they see in you, and you feel like no one truly understands you. This song has lyrics that can be relatable to pretty much anyone and has a twist with a glimmer of light appearing towards the end, and the end "you are my light" to end the song, it means there's a special someone that's helping the character in the song away from the dark, be it a family member, friend, or potential lover.

Lil Vald