bad dog

I get mean when im nervious, like a bad dog Sometimes when I try to play I bite without meaning to hurt I usually bite those I love the most, I don't know why I do it I try to be good and improve, but I always go back to where I started It's like walking in circles in a forest, or trying to move forward on a treadmill. I get mean when I get nervous, like a bad dog Muzzle me and chain me up, I will be quiet once and for all I'm scared, I don't want to go through that again. Please don't go, but if you want to go, do it. Please don't leave me, but if you do, it's okay, I'll wait sitting in front of the train station, even if I knew you would never come back Oh, please don't come closer, I'll hurt you even if I don't want to I hate being a bad dog, I don't know why I bite