Ok... I met a girl when I was a teen (mid/late 30's now). She's one of my oldest friends. I wish I could be sweet and say it was "love at first sight", but it wasn't. However, after getting to know her over the next year or so, I fell for her. It's strange because it's not my normal M.O. of rushing into everything with a woman when I meet her (jumping straight into sex, falling in love within a week, needing that constant companionship, etc); it was a gradual thing where I realized one day that she's just amazing and that I loved her.

We sort of dated, then I had to move for work. I came back and we saw each other again. Then she had to move because she decided to finish her Masters and the college she went to was out of town. Even during our separations we would stay in touch. At first just through the phone, then through social networking.

The thing is, I've never stopped having these feelings for her. And I told her that last month when she contacted me asking if I could provide her with a place to stay when she comes back into town. I took that risk (ha! someone like me taking risks), and to my surprise she told me that she felt the same way, that she always misses me, and that she still has feelings for me. I was on cloud 9. 

Well, she finally came back into town, but one of her girl friends lives on the beach and offered to let her stay there. Of course staying at a beach house was more appealing than my dump, so I didn't blame her when she chose to stay there. We promised each other several times that we'd see each other. Yet... we haven't yet.

She'll text me or call me asking if she can stay at my house for the night, then she'll say she's ok and has another place to stay near the beach. She'll tell me she misses me and that she cares about me so much and can't wait to see me and that I'm great and everything else that's nice, but then... I won't hear from her again until the next time she calls asking if she can stay with me for a night (she doesn't have a vehicle at the moment and every time she contacts me about this I'm tied up and can't go pick her up).

/r/BPD, it's **painfully** obvious that she's just saying these things to use me (which is something I've let people do for too long). I don't want to believe it because of my real feelings for her, but it's just true. My question is, how do I just let her go and get her out of my life completely? 

Right now I feel more worthless than I've ever felt. I've treated someone else very badly today because of it. It wasn't their fault and they didn't deserve it when they were just trying to help me. But I feel pathetic. I feel minuscule and worthless and just... not good at all.

TL;DR how to let go and completely remove someone from my life when all they're doing is manipulating me and using me? I don't want to continue driving myself crazy.