Think of it this way. Many people are related to one another that they don't even know about each other. Either they are far distant relatives or close relatives, but they still don't know all of them. So with some much relatives that they don't know about, many of them are dieing each year. Heck...probably a relative of mine that i don't know about just died now. The point is to not let this go to much into your head. Since that relative is someone you know then its good feel sad and give them a prayer for awhile. But don't let it go throughout your life. Just keep going on with your life and know that they are at a better place so you don't need to worry too much.