Sure, here’s a thoughtful response you could use:
Let him know that I am in a relationship as well, and I am also striving to get on the right path with the Lord. These past years have been challenging for me; I lost my older brother, Irv, in 2017, and just this July, my dad passed away. We are still grieving, but I hold onto my faith that God has our backs as we remain strong. As it says in Psalm 34:18, "The Lord is close to the brokenhearted and saves those who are crushed in spirit."
Feel free to adjust any part of the message to better fit your voice or the context!