I went trough the same a couple years ago....
I played a lot of Lineage II during the day with a group, I will call him Roro, we formed a clan in one of those private servers and became one of the best clans in there. We were all friends and we knew each other, some times we went to PC bangs to play all nighters of L2 and always threw banter between each other but it was good times.
The day he died was weird, felt slow, and a friend who played with us on L2 and now plays with me on Destiny came to my house to tell me that Roro died, scratch that, he was killed by his cousin, they were drunk and got into an argument and his cousin used a rock to beat him up, and ended up killing him.
I felt numb, lost all energy, I knew that guy for years and because of some unfortunate circunstancies he died. Every time I play L2 now I get reminded of him, I remember his builds everything, I, just couldn't play the game anymore without bringing his memory. Now I just play the game and remember the good times together. Because we had plenty with the old clan.
Rest in peace buddy.