Poem Prompt: Substitute

I'm not what you want,

I'm not what you need.

I'm not enough,

I'm not it.

I know, I've been told. 

But I'm still here--

I always am,

always have, always will be.

Even if I'm never your first choice--

or second or third or fourth--

I know that eventually,

in your time of need,

you'll turn to me and I can comfort you.

And that's more than enough for me.

Though you won't return.

You'll take what you want and leave

without even looking back.

I know that I could never be enough

even if I tried--yes I've tried--

so please, take what you need,

move on.

I'll be satisfied.

And I can only hope that you are too.