There is no such thing as "normal". Everyone deals with struggles and happiness and a bunch of other emotions. I believe it will get better for u. I mean nobody is always happy. It comes and goes and then comes back again. It's a vicious cycle. Depression can be so hard I've been there. I know what it feels like when u don't think u'll ever be happy again. Just give it time. Ur only 21 u have a long life ahead of u. It'll get better just give it time.