The one who speaks words I should not have.

The one who speaks without consulting the mind.

The one who uses feelings to fuel my words.

The one who only burdens this girl.

Having me is harder than not having me after all, I only make things harder for her.

I may just be a small piece of flesh, but oh, do I cause many problems.

Her lips cannot silence me, her teeth would just bite me, but never can she silence me.

Never.

The Heart fuels my words with emotions as I come up with things to say faster than I can say them. 

The Mind.

Only a useful word finder I use to come up with words and sentences she later, will regret.

I, the tongue.

Only a small piece of flesh, that causes her more things to regret.