There is enough love for everyone, but maybe not enough time to give everyone what they are used to. Isn't this the natural order of things? Isn't this part of Little Man's socialization? He is learning in the most natural way that he is not the center of the universe, that there will be others with competing needs and interests. The accommodation for the new baby is preparation for the accommodation he will have to make for classmates, and others.
He will only be hurt if you, and others are more charmed by the new baby than they are by him. That's not going to happen😇. You won't let it happen.
Have fun. Love your new baby and son and allow yourself to be human, dear @ruth-girl.