Who Am I?

4

Never forget. Why did he say never forget? Is that what I've done? Have I forgotten something?
Something important? Why is there a thought tugging at the back of my mind?
What does it want to say?
Does it know?
Does it know what I've forgotten?
Why do no monsters notice me. They never touch me, the go around me. I'm solid. But they don't see me. My actions don't touch them.
Like I don't belong here.
What's wrong? Why is it like I don't exist?
I'm real, I'm here. I know I am. I can touch things. I can hear. I feel. I get hungry. I taste the food I eat.
But the foods still there. I know I picked it up. I felt it in my hands. I saw it, chewed it, swallowed it.
My actions aren't affecting this plane. It's like I exist somewhere not here.
What did I forget?