Sorry about the loss of your friend.
I knew a JW who did the exact same thing. He was a man in his 20's.
Unfortunately, this cult puts lots of guilt onto people. It also makes life almost unbearable if you want to leave.
I remember being JW and thinking that I was supposed to be "joyful" because a fruitage of God's holy spirit is "joy". If I wasn't joyful, I didn't have God's spirit! This leads to people pretending to be happy because they think they have to look happy in order to fit in in the congregation.
Suicide results from lack of all hope...and this cult, whilst not being directly responsible for someone's personal decisions, certainly contributes to maladjusted thinking.
Sirona