What kind of fuckery is this?

I have been trying to be a better person. I suppose that was precipitated by being pregnant with my son, and learning a little bit about Buddhism. I guess I am still on a bit of a personal quest to have right thoughts and actions. So you'll forgive me this lapse. I'm tired and the kids are driving me a bit nuts. I am not the Dalai Lama, you know.
Since I started writing this blog, I realised I have a public (well, sort of public, given that I only have one follower - hi SJ) forum where I can tell the people who've fucked me over to, well, fuck off with cherries on top.
So, here goes (I might only get on to one at at time, but I might get on a roll of hating, so you never know):
The person really getting my goat is a former friend from uni. The thing that annoys me most is that I was too gutless at the time to just tell her to fuck off then. I'd like to tell her to fuck off now too, but somehow, I don't feel I will be building my pagodas to nirvana by doing that. Plus I will look petty and spastic and everyone will see me for the insecure nutjob I am.
She used to tell a mutual friend that she was anal for washing her bed sheets regularly. I should have said then that it's just disgusting to be an ugly fat moll who has such a sense of entitlement that she can pass judgement on others and tell them how to live their life. (I'm pretty sure she's still fat, so that's something).
Once she told me not to be uptight about using my stereo for a party because I was worried it would get broken. She said "it won't get hurt" in the most patronising tone, and guess what, it got broken. I guess when mummy and daddy sort everything out for you, you probably don't need to worry about such trivia.
Another time I wrote and told her how badly I was suffering from depression, because I thought I could rely on her to help me at least by listening. She never even called.
She also felt it necessary to get on her high moral horse and cast the first stone to save the finer feelings of someone she cared little about knowing full well she would end our friendship.
I don't know what pisses me off more about it; her treachery or the fact that my friendship didn't mean anything to her at all and I got played.
It was more than 10 years ago and I'm still haven't really reconciled it with myself. Why do I hang onto so much anger about it?
Not a very good Buddhist. Ohm.