my best friend is my enemy

its my best friend, it never leaves me side. yet its also my biggest enemy, it manipulates me in my every move. but it makes sure that im never alone. it knows my greatest fears. yet at the same time it isolates me, it uses my fears against me. it helps me cope, finds ways to look okay. it made me a mask so no one sees me it muffled my screams to protect itself it pushes everyone away. its like a virus, a very comforting virus, one im terrified to let go of. my best friend, my biggest enemy, its depression... and i wish someone else could save me.