My dog is acting strange since we got a new puppy?

I think it's the nature of the dog. As we also get distracted when our best friend has new friends around him. We feel left out but we being social being we can adjust it. But it's a animal it is hard for it to understand but just take a little care about it than usual. Then it will be all right it's just a matter of time. you just have to give attention to them a little more.