You are not alone buddy. I know exactly how you are feeling, and it is all normal. You just want people in your corner. Most people are very reluctant to take sides. As a general rule, her family will side with her, your family will side with you, and all others just do not want to poke in the mess. Some people will not agree with what she is doing, but will still side with her so to speak. Some will be enablers, I would suggest you defriend them. Try not to hold grudges. REmember they were her friends first, and she has probably been feeding them all sort of her version of the truth.
The real truth will come out. I would suggest you not try "persuading" them with your version of truth. It will just make you look pathetic and petty. Remember, the real truth WILL come out.
You have to start looking out for yourself. You have a ton of healing to do. LEave you W be for now, there is nothing you can do for her.