You are still a family. No-one can change this.
The most important things stay the same. You are loved and cared for. You love your parents, grandparents, aunties, uncles, cousins and all your friends. Some things may make you sad now but this will change as you get used to things.
Sadness only lasts while you are all trying to get used to the changes. Can you remember your first day at school? Or your first time at the dentist's? I bet you felt a little scared? And why? Because you really didn't know what was going to happen and so you felt nervous. Am I right? I suppose everyone is a little nervous about any big change. But that quickly feels ok again. Doesn't it?