I'm sorry for your loss. I think suicide is one of the worst kinds of death as there are so many unanswered questions.
Things will get better. It takes time but they will get better.
In the meantime, try and get out of the house. Go see a movie, go to a friends house or you can go for a walk. It will help you to get out and get back into the mainstream of life, whatever that is.

Good Luck to you,
Linda