Going on only what you've shared here, I wouldn't even bother talking to her. Just quit contacting her, just like she does you, and go about your business. I guess I really have a soft spot for nice guys who get taken advantage of. But yes, the mature way of handling it would be to have her over, put a pot of coffee on, shut off the TV and talk about what you're feeling. But please don't fall into her trap. She may be the one feeling like she doesn't want to be alone here. In other words, she may be using you for her own insecurities.
Looking forward to reading the results of what you decide to do.
