@kiddie - that’s odd of your aunt having everyone in your family in the bridal party except you. And I get that as a pre teen girl that would hurt…
When my oldest brother got married neither my sister nor I was asked to be in the wedding party. There were 8 bridesmaids (not a small wedding!) and SIL has no sisters. I was 21 and didn’t really care but my sister (age 16 at the time and very close to our brother) was upset.