I have two lovely sons, DS1 is 5 and DS2 is 3. I have 5 very close friends, every single one of them has a DD who is about 4 (all in the same school year everything), this wasn't planned obviously, 3 of them are born within 4 months of one and other, the others a little later. Most of them have other kids too, one has a 2 year old boy, another a 6 year old boy, so I can bond with them over that.
Right now all their girls are due to start their first year of proper school, they are all bonding over that, buying their cute uniforms etc. Last year my son started and I didn't really have anyone to share it with.
The girls all do ballet together on a Saturday morning, the school they do ballet at has a cafe so they all sit and have a cuppa together, neither of my boys want to do ballet, even if they did it is done on school years, so I'd be there at a different time.
When they were babies, it was much much less noticeable my son and the 5 girls were born within 18 months of each other, the baby stage and even toddlers was great.
Now the group chat is all buying the right ballet clothes, sharing cute outfit ideas etc. I just have nothing to contribute.
AIBU feeling left out? I don't really have other friends.