My first AIBU so be gentle 
A and I were close friends since childhood. She was my bridesmaid, etc. A few years ago she had dcs, and soon after dd2 was born she split up with her partner. He was an utter shit, made her life hard even after they’d broken up, and to support her for the first couple of years, I didn't mind being the one to always come to her. She could somehow never make any of my events or invites because of xdp messing her around on visits, childcare falling through etc.
But I look back and realise that I haven't just made most of the effort, but all of it. She never found a way to come and visit me even when I had dcs of my own, moved into a new place, had miscarriages, etc. She lives less than an hour away, and regularly has family look after the dcs. It’s not just that she’s never visited, but never really asks about what’s going on with me, didn’t even send a card or ask for photos when I had dc2. I know she manages to get out and do other stuff, she meets “amazing” men and dates them for a while, goes out dancing with minor slebs, all of which she finds a way to to tell me about.
I’ve read lots of AIBUs on similar topics, and most people seem to advise just walking away/getting over it. Thing is, I came to exactly that conclusion about 9 months ago, so stopped contacting her. Since then she (unsurprisingly) still hasn’t made any effort to see/ask about me but occasionally texts an update on her life, or a vague promise to visit which fizzles out when I suggest some dates, and then no follow up.
I wish I could just ignore them but each time, I get upset all over again that she stopped caring, that I lost a really good friend, and feel low for a few days. I just want to ask her to leave me alone and get on with my life really, stop pretending to be friends and stop asking me to care about what goes on in her life without giving a shit about mine. 
Also, somehow if I don’t reply when she’s sent something that’s big news for her, makes me the bad guy, and the thought of that really annoys me. That she might get righteously angry about me doing something she’s been guilty of for years. I just don’t think she has any clue what she’s done, what she continues to do.
So, am I a bitch/mad cow if I say something, or a wimp/doormat if I don’t? DH thinks I should take the male route – block her number and email but don’t tell her. Sounding quite tempting 
Thanks for any advice you can give.