I know that you love me, and I know that you care
but what I have done is something I can't bare.
I made a big mistake, yes it's true, this I know,
is why I've banished myself to this darkness all alone.
Leave me to this place, where I need to stay,a crystal wall,
and if you see me again I will give you your final call.

Who am I?
I'm thinking it may be too easy but we'll see I guess. I'm a bit rusty.