I have dyed my hair black a few times.I really want to go back blond.but everything that I have tried hasn't worked.do I have to bleach it?

It depends on what you have done to it already. Typically you use haircolor remover: ColorFix, Color Oops, Igora Phantom, and wash out as much of the black as you can. This may take several applications. Once most of the haircoloring is out, you have to bleach it.

If you have already damaged it to the breaking point, you'll have to grow it out first.