I saw somebody else's question about talking to yourself

I have talked to myself for years, ever since I was a kid. It fills a need, obviously, or I wouldn't do it. But it's gone too far and I'd like to moderate it and I CAN'T. That causes me great distress. I don't mind verbalizing to clarify my thoughts, but this is usually rehashing old conflicts. Talking aloud does help me sort out my thoughts, but there's too much misery and anger associated with fighting old battles and not letting them go. It's intefering with my life -- and I don't know what to do about it.

Any suggestions, feedback, pearls of wisdom, experience -- anybody?

Thanks!