I totally understand that. I'm just trying to get a lay of the land so that I can offer an idea.
I guess at this point, I'd keep to the people I know and love. If anyone that knows and loves you sees a nasty post of hers, either they can report it or let her know that she is classless.
But most loser people don't care that they are losers. You need to rise above it. She says those things about you because she is insecure and has a low self esteem. She wants to make herself feel better. Unfortunately, you must strike a cord with her (either because you are better looking than her in her eyes or you appear confident in a way that scares her... I'm guessing here, but it feels right to me) that she needs to make herself better at your expense.
But the smart people can see through it. So keep your head high and keep being you. Don't let her drag you down to her level.
Mix of 3s, thick, coarse, medium porosity
Current hair styling technique: rake with a scrunch at the end. (works with my coarse hair)
Known HGs: KCCC, homemade fsg, honey