IHF,
I must preface what I am about to say by saying that I adore women and respect them, and I have several long-term female friends that I love (platonically!) and admire. They really brighten my life up, and I am very grateful for that. So I hope no-one thinks I am being misogynistic in what I am about to say...
One thing that I have observed in real life, and it happens with incredible regularity, everywhere, is that a woman can behave absolutely despicably, being totally horrible, callous, and disrespectful to some man who loves her, grind his heart, his hopes, and his dreams into the dirt, and then say, "I hope we can still be friends".
I never, ever, see a man who has treated a woman terribly say that to the poor thing as she staggers to her feet, feeling dazed and destroyed. Yet women say it all the time to men they have devastated, as if they want some kind of absolution from their victim, some kind of endorsement from that says, "Well, if we're still friends, I'm obviously not a bad person, am I?"
I can understand the women in question wanting to absolve themselves of being the bad guy, even when they truly are awful, and should be ashamed of themselves, but for the men involved, there is an exquisite cruelty to being asked to be friends, because it asks us to write off all the pain and wrongdoings that have been inflicted on us, and just be 'nice' to the person who put us through the meat grinder.
So, IHF, I understand your compulsion to respond, but honestly, there would be nothing wrong if you just leave her messages unanswered. She is contacting you to make her feel better about herself, so why play the game?
I had a friend who actually put a big piece of cardboard by his phone (back in the days when we all had landlines), which said, in capital letters, "DO NOT CALL COLLETTE". He had a habit of going out for a few beers with his pals on a Friday evening, and then he would go home, drunk, and call his horrible ex-girlfriend, Collette, and then regret it the following day. We have all done these things, but the urge passes, and then we start to get on with our lives again. You will too, my friend.