Not anymore, but I used to think that not only they loved me less than my older brothers, but that they must have adopted me, while they were biological children (little did I know that I look like my parents and my brothers - a lot!)
I remember when i was 6 or 7 hiding behind close doors trying to catch glimpses of conversations about my adoption.
Crazy, I know, but children see things differently, and perception changes reality sometimes.
Thank goodness I survived and at some point I knew they were all fantasies. :)