Most of the time, I feel okay. Many times I feel hopeful and happy and excited about things (but not, like, super happy or hyper or anything.) But then often, whenever I feel alone and sad, which happens like every other day when I fight with someone, life does not seem worth living at all and I want to die. And when I feel like that, I enjoy nothing, and non-existence seems better than any activity, and I just sit and stare, or cry. And then the situation ends well and theres no more fight, and then I feel okay. Is this real depression?