A former friend of mine did something similar to me once upon a time... she simply stopped being my friend one day--quit returning my calls, punked out on our season tickets to the theatre--and the only reason I found out is because I ran into her at a party and she hella dissed me in front of a bunch of people. It was pretty harsh. I went home that night and cried my eyes out.

I don't mind if someone just doesn't want to be friends anymore. It hurts, but I get that it happens. But at least have the decency to tell me to my face.

Whatever her reasoning is, she's not being very mature about it. Judging from your original post, her original reason for being angry was pretty specious. I know you miss her, and you probably will hurt over this for a while, but it sounds like you're better off without her. Seriously? You are a great person, and a stellar mum. Don't let anyone tell you different.