Writing is especially helpful. Like reading, it is available when people aren't. It also allows you to express everything you feel, including your anger, without hurting others. People should not expect much from you for a long time. Fellow workers and friends need to know that recovery can take as long as 2 - 3 years.
Anger is a natural reaction to having been hurt.
Suicide survivors have been hurt as badly as anyone can be. We are angry and are looking for a target. I tried not to take my anger out on my friends. Instead, I took it out on my car. Each time I got in or out of my automobile, I used it as an opportunity to slam the door just as hard as I could.