PR, the easiest way to deal with this situation is to think what they must be doing at this time (your deceased friend and her family). From what we learned, because of the kind of death they experienced, they are shaheed, meaning that as of now, they are VIPs and are treated like that by angels. Is that not what we all want? This world is temporary, we all have to leave it. What is going to happen to us in the afterworld matters the most. They are literrally in a better place and I can gurantee you that they must be so happy that even if they are given a chance to come back to this world, they will refuse.
I am extremely sorry to hear that CE. There is no doubt that Allah has granted him a place in jannat because he was masoom and just a kid. May Allah grant you sabar.