Can someone tell me to get rid, I pretty much know that's the answer, but something I dont want to admit to is holding me back.
I'm currently waiting to see the doctor on Friday as I currently suffer from depression and this whole shagsack of a situation really isn't helping.
Get rid. You've tried to make it work a few times, it isn't happening. You were dating, she was still having a friend with benefits, so that's probably what you are to her too. However, she doesn't like it when you do the same thing, and throws a strop when you treat her the way she treats you.
She's just not that into you. Best move on and find someone who is.