Happy Birthday?

Blast
Lyrics + Music: Yuina

Do you hear my heartbeat? With each beat of my pulse I'm dying
Since a person's lifetime is long and really painful, I'll find something

That place was big when I saw it as a child, but now it's really small
Who am I, what do I do? Ah, I see. I'll tell you....

Happy birthday to you? The thing in this place may be a mistake
Unhappy birthday to you. Now you say "Are you truly alive?"

Sometimes I'm attacked by an intense lonely feeling
I'm nearing the end and no one notices

If I think now, I'm always hanging my head in shame, so I don't know how big the sky is
I want to forget my total defeat because I can't think about anything else now

Happy birthday to you? I wonder if there is no meaning behind being born
Unhappy birthday to you. But this blade cannot move

Not coming from my suicide wish, what is the feeling of exhaustion?
Is there any place which isn't the world we go to after death?

Happy birthday to you? Being born, you are now very unhappy
Unhappy birthday to you. The clock burns and then I can be immortal
Unhappy birthday to you. I pity this day I was born
Unhappy birthday to you. Such a day is rare, so I'll look up to the sky

Notes:
I don’t think I’ve ever translated a song that has made as much sense to me as this one has! At first I didn’t understand a word of it, as the Japanese is a little weird in parts, but from Tomoko’s help I changed some parts I had mistaken, and now it makes complete sense! He’s writing this song on his birthday, evaluating his life and being unhappy with it. The line “this blade cannot move” refers to the fact he wants to kill himself but doesn’t have the willpower to. Then his outlook changes and with the last line, he is looking up to the sky he’s never seen. Yay!