It's as if I don't remember how to be happy. Like my brain's

It's as if I don't remember how to be happy. Like my brain's reward centres are broken. I'm just numb to everything. I don't know how to feel okay anymore.

I've been feeling really depressed lately, too. It doesn't make sense, because I really don't have a good reason to be depressed or sad, but I am. And it's annoying because it makes it hard to get through the day. I'm constantly trying to find the next thing that will keep me happy long enough to make it to the next part of the day.