issues from childhood? I mean ya you can talk...but what does talking do to really help change it?

I have a pretty bad issue that keeps repeating in my life, I know WHY I am this way... but it doesn't change anything. I talk in therapy, its' nice to vent but it does not change anything. I am just wondering how stuff like this is supposed to be fixed so to speak? I don't want to spend years in therapy just talking about it. I want to change my pattern and end it, somehow. I just have no idea how.