<human>: Can you condense the text into a few key points?

So long story short this girl and i dated for a year and then she *made* me break up with her on our 13th month. I was foolishly in love with her so much, but she didnt feel the same way and i couldnt accept that. So she makes me say the whole break up deal (which of course ripped me to shreds) but that she still wants to remain best of friends. I just said alright but didn't want to talk to her for a while because of how much pain she put me through during the last few months of our relationship. Now she is trying to get involved with my current girlfriend (whom ive been with for about 3 weeks now) and wanting to become her best friend so that she and her own current boyfriend can go on a "double date" with us. I cannot stand having her do all this, especially after *she's* the one who wanted me out of her life. So whats an easy way of saying, "Get the hell out of my life, bitch" without sounding like an asshole? The only reason i dont want to sound mean is because her parents are fairly close to mine and talk quite often.
<bot>: Ex puts me through months of emotional pain and heartbreak, wants me out of her life, and then now wants to be very close with my current girlfriend. How do i tell her to stay the hell away without sounding too mean?