to be honest, you are making this mess worse. You keep going back to her. She has 0 reason to change.
Yes she needs counselling, but you are holding on really tight to a slowly sinking ship.
In our numerous discussions she tells me shes doing it to 'feel' and she has no idea how to be a friend without having sex involved.
Most notable thing you have written. Regardless of your relationship, she needs help badly. If this is true, she has some serious problems.