AITA for not giving my dog to my friend’s kid who loves him?

I have a small dog named Max. He is very sweet and calm. I’ve had him for five years.

My friend came to visit with her 7-year-old daughter. The daughter loved Max right away. They played all day. She even cried when they had to leave.

A few days later, my friend called me. She said her daughter has never connected with a pet like that. She asked if I would let them have Max.

I was surprised. I said no. I told her I love Max and he is a part of my family.

She said she understood, but sounded sad. She said her daughter was heartbroken.

Now I feel bad. I know they would give Max a good home. But I love him and don’t want to give him away.

Some people say I should have done it for the child. Others say it’s okay to keep my dog.

AITA?