Well, silly or not, it bothers you but I have to agree with the others - either accpet it or lighten it. No, I don't like dyed hair either so I don't do it,and my hair is down my back, too. But if it was me, and I had to choose between naturally dirty-blonde hair that's curly and healthy looking, or hair that's bleached out and going every which way down my back, guess what? I'm going to leave it exactly the way it is, keep on doing exactly what I've been doing, and find something else to worry about. Because if you think your natural color getting a little darker is such an awful color, bleached hair that's turned brassy or yellow isn't so attractive, either. Personally, I think you'd be nuts to do anything at all. If you're proud of the way your hair looks now, and you obviously take alot of pride in it, who the hell cares if it's a shade or two darker? For all you know, it just may look quite stunning with your coloring. But how will you ever know if you run out and bleach the dickens out of it right away? I think if you start bleaching it and going that route, it's only a matter of time before we read another post from you saying "HELP!!!!!!! My hair is falling out!!!!!"
Leave it be, because I think if you don't, you'll have alot more hair problems than just changing color.
Be thankful for what you have, and ask us something we can actually answer.....like what kind of shampoo to use.
Take care.