My sincere condolences for your loss.  Losing a loved one in death is so painful because death is not natural.  We were created to live forever.  God will soon do away with death (1 Corinthians 15:26) and resurrect the dead (Acts 24:15) to live forever on earth (Psalms 37:29) under his kingdom.  The same kingdom we pray for. I hope these scriptures will comfort you.