William,
Your son is sleeping. God will comfort and heal your crushed heart. "To revive the spirit of the lowly and to revive the heart of those being crushed." (Isaiah 57:17) He understands your pain, and your suffering. Soon as he did for his son (John 3:16), he promise to do for yours. John 6:40 states " For this is the WILL of God, that everyone who recognizes the Son and exercises faith in him should have everlasting life, and I will resurrect him on the last day.” Reflect, and have faith and comfort in those words, in time, you and Billy's boys will be there to embrace your son, and all of your loved ones again.