If so, make a plan to change whatever it is. Worry is not all bad. It causes us to think things through. The key is to channel that worry energy into something productive and to re-prioritize our worry into things that really matter and that we can do something about. Family structures constantly change.
Family members move away or become distant.
When you cannot be with your family, communicate with them in some way, unless your family is abusive. Then it is best to treasure any supportive relationships you have now. You may want to talk to that supportive friend about painful family relationships. If you are feeling sad, talk to someone about how you feel. If you are seriously depressed and can't seem to pull out of it, seek professional help.