You are a cirrus clouds! Cirrus clouds are the thin, wispy clouds seen high in the sky. They look as if someone took a cloud, stretched it, pulling pieces off, like a cotton ball when it is pulled apart. They are thin because they are made of ice crystals instead of water droplets.
When it comes to physical appearance you are usually thin but tall. Just like a cirrus clouds it means that you are comfortable to be with because you are nice and can brighten the atmosphere in a group.