Is this immature or would you feel the same way?

I don’t know why I’m like this. My daughter’s sister in law has a four year old son. I see him once a year. We have never interacted.
The last time I was around him he was trying to push me off the sofa. He wanted the whole thing to himself. He pushed with all his might and I didn’t budge while a couple people laughed. His mother said, “you shouldn’t treat Miss Aster like that!” and he said, “I don’t like Miss Aster.” Now I don’t like him and may never like him . Are you like this too? I doubt it but thought I’d ask. His mother worships the ground he walks on.