so yeah im looking at the list of the people died in the ir to ukraine plane crash, and i have known like 10-12 of the people that were on board, 3 of which were very close to me at least in some point of my life. im overwhelmed with a kind of sadness that i have never experienced before and im afraid that if i dont manage to think about something else i just might throw myself out of the window
what should i do
There is an answer in your comment: 'think about something else'.
Upd. If somethin' bad would happen to me, I'd try to work more.
Job helps not to think about your problems, especially it will help you if you should talk on your job (with customers for example).