Heaven Knows (feat. Ruru) lyrics

I'm opening a letter I'm scared of what's inside It kills me but I'm alright When you leave me here alone All the thoughts come alive in my head All the stupid things I could say to you come true to you do Let's pretend we're alright Laying still side by side It kills you when I'm just fine When you leave me all alone All the thoughts come alive in my head All the stupidest things I could say to you I know I won't but Heaven knows when you're here alone That's when you really need it the most Say to me you'll never go I hope you really do care