You wrote:
“The idea that he wanted to be buried with his “friend” is creepy.”
Not to those who understand Christian friendship. You might want to read Aelred of Rievaulx’s twelfth century classic called Spiritual Friendship (Cistercian Fathers 5, $12.95). I assume I’ll be buried in my family plot, but I wouldn’t fret over being buried with my Christian brothers and sisters who are as dear to me as any family member. I also would not mind if my heart were interred at Altotting (but I’m not a Wittelsbach).
If he wasn’t Catholic, you would think it was creepy too.