My only crime was and remains insecurity that came from a childhood of abuse and neglect. It made me vulnerable to their criticism in a way that still stings today, 30 years later.
This is the core of your true issues. The issue is your own insecurity. Some pretty, popular girls are mean and some are nice. But having this insecurity in your own psyche is what is keeping you from moving on. I honestly think the best thing you can do for your daughters is to instill in them confidence of their own choices and love of themselves, and then also perspective on the lives of others. Its always hard being bullied or left out or etc. But having that core self-confidence is what helps people stand up to all the crap and find their own niche in life. Life isnt fair. But the moral of that isnt: "some people have it all, and I have it worse". The moral is: everyone has a little good and bad, and you can't always tell from looking, and so make good with what you have and be true to yourself. My mother always said, she wished for her kids to be "good" not "happy"--because if you can learn to be "good" then you can make the "happy" come for yourself. . .