So, the person who formerly sucked my lifeforce, emailed me today to say that she really missed having me as a friend. Yes, there's a reason for that: I am a good friend. I really sat down and thought about it. The fact is I don't miss her, and there is indeed a reason for that: She is not a good friend. The entire email was about how she's not as mad as she once was at me (gee, thanks), and gosh I've just made such a huge difference in her life, and won't I please start talking to her again.
The email needed to say that she'd done a lot of heavy duty therapy, and that she understands that she was a crappy friend, and apologizing for that. But it didn't. Have I been waiting for that? Nope. Between love and hate, there's a vast sea of indifference. She falls into that ocean.

thank you for hitting the nail right on the head! that last paragraph completely sums it up.