What’s wrong !?!!

I’ve literally lost interest in everything. I stopped going to class, I don’t shop ,get dressed up or go out anymore (things I absolutely used to love) I’m up till really late and when I do sleep it’s for 12 hours or more. And when I wake up I feel exhausted. I barely work when I have to go in I’m always late I just sit home trying to think of some excuse not to. Last week I went to a party and it felt as though someone else was controlling my body. I was doing what I usually do, dance, make some jokes, but it all felt so forced.. what’s happening? Am I just growing up or am I slipping into some kind of depression