Whether people should wait for replacements because of their age is debatable. Some doctors feel that if you put in a hip into a young patient, you are increasing the chances of the patient needing a second hip replacement when he or she gets older. However, there is also the quality-of-life issue that needs to be discussed. If someone is in tremendous pain and can't function because of a sore hip, then a replacement might be called for.
Speak with your doctor and make sure that he understands completely how this is affecting your life.