I do have a sister - and she's a full weight cow</>! Anyone want her?
Since my husband only has a brother (who's very nice, by the way), I don't really have a positive sister figure in my life. Last year, though, I spent some time with my aunt in the US, and we got on really well. She doesn't have daughters or, for that matter, any close female friends, so I think we've formed a relationship that's very sisterly in its outlook.
Her son (my cousin) and I have also formed a very close but long-distance friendship over the years. He is my best friend and I actually consider him to be more of a sibling to me than my own sister.