So sorry to hear about your work collegue, It is often the ones around the person that suffer after suicide, my mother did it in 1998 and it was total fallout around her for the people concerned, he must have had a good reason.
I hope you will be ok, I'm sure you work mates will be good around you after what you have already been through, big hugs anyway and keep you chin up,
All the best Tiz xx