to feel relieved that my daughter is popular

[AgaPanthers]

DS has Aspergers and doesn't have great social skills/many friends. DD is 5 years younger, but is much better socially. So for the first time I've noticed the social posturing that seems to go on from parents (don't be friends with that girl, my daughter is much better) worried about their own children's social status trying to carve out their space. And it's come as a bit of a relief TBH, that DD is clearly not on the bottom rung.

AIBU to feel a sense of relief that we don't have to worry about it?

YANBU
I have a socially inept prone to getting bullied Dyslexic DD1and a makes friends without trying, best reader in the class DD2.

The relief of not having to be 'that parent' a second time is enormous!

I don't think it's unreasonable to be relieved/pleased that one's child is making friends and "fitting in" socially at school/with their peers, simply because it can be utterly overwhelming when a child doesn't!
Of my 5 children, my no2 son ended up being withdrawn from school and home educated because of horrendous bullying, and I was genuinely terrified he would sttempt to take his own life at one point :( and at my wit's end over what to do. Every time there's a story in the news about some poor child who was so desperate they did kill themselves, I am thankful all over again that my son is still here, qualified in a profession, and my other children are so far so good doing ok in minstream schooling.
If it came to it, I wouldn't hesitate to HE again, but I am relieved and pleased that my younger ones seem to be doing ok and don't blame you one iota for feeling the same Aga
It has always been the biggest worry I have ever had over any of my children - sending them to school, "at the mercy" of "other children" iykwim.

At the mercy of other children is a feeling I know only too well. With a smattering of and that uncaring cow of a teacher thrown in.

Fortunately, every Friday DD1 got a teacher who did care what certain boys were up to and cared that DD1 was upset.

YANBU. I was the bullied child up to 16, and I had few friends.

Whereas DD has about half a dozen honorary parents, and her friends' standard description of her is "really lovely".