Hey there , i typed " dealing with pessimistic people " in the google bar and clicked search , and these is what came out !

http://www.alexlandis.com/2008/02/24/dealing-with-negative-people/

http://www.helium.com/knowledge/136522-communicating-with-negative-people-and-the-effect-it-has-on-your-happiness

It is a very useful resource depending on how you look at it , but i think its great !

If u cant change a pessimistic person , isolate yourself from them ! sounds rather selfish but this is the best way i've thought and read from ! No point playing along with them to ruin your life !

Please read if you can ~ it helps digest my thoughts towards pessimistic people after a few secs reading them !