You are not considered selfish when you deny sharing something you love the most. The same applies to a person. My uncle died 6 years ago, since then, my dad has been taking care of my cousins, my aunt and my grandparents, not only financially, but also, emotionally.
I don’t hate them, I hate the fact that my father seems to love my cousins more than they love me and my brother. I know it is out of jealousy, but sometimes, situations makes me feel as if they are equal in the eyes of my father. That might be still okay, but I get mad when they’re prioritized. It kills me every time my dad hugs them and not us. They do need father’s love, but my aunt won’t let them. We insisted her to marry again, she is pretty selfish and witty, she is here for my dad’s money.