Depression is becoming addicted to anything that gives you purpose. Whether it’s being a perfectionist in academics or becoming a workaholic. It’s becoming the most involved in a group or organization because you need something to look forward to. It’s excelling in sports because it really helps to have that and a team to fall back on.
It’s the need to be busy because if you’re not you’ll spend too much time alone and everything will get worse.
But more than that, depression is the person who would do anything to make others happy because someone else’s happiness is their own.