Getting Rid of Fleas in Human Hair?

I've read other questions and answers, but nothing will work for me. I have very thick, wiry, curly hair that I can't get a comb through. I refuse to dye my hair because of it's rare red color. What do I do? I'm at this point at a loss and I don't know how I got the fleas. I've read up everywhere and they are human fleas. I'm the only one in my house that has them and my boyfriend doesn't have them either. I haven't physically seen a flea in about a week, but I still have the black dots I read they are called "flea dirt". I hope someone can help.

Thank you!

~Circus