Why do u do it?

What have i dun to hurt u so,
please tell me cus i don't no,
if i don't no i cant sort it out,
sometimes i just want to give u a big clout.
I blame myself for many a thing,
so just give me a ring,
if u don't like me just say,
so i can put my mind at bay,
iv never asked much of u.
Just av i got a friend in u?