Your friend, your 'brother', wants what is best for you, this you will know in time. Spend time talking about him and thinking about the good times with his parents. You are their son now. This is how you will heal the hole in your heart.
Do his memory great honor. Whenever you do an act of kindness, however small for someone else, think that you are doing it for your friend. That is what he wants.
He had a great life, sadly it was short, but he lived more in his 41 years than many others do with more time. Be glad for the years that you had him. Remember him always.
Slowly, by the Grace of God, you will be able a feel OK and go on.
In paradisum deducant te angeli,
in tuo adventu suscipiuant te martyres.
Chorus angelorum te suscipiat,
et com Lazaro quondam paupere
aeternam habeas requiem.