Suicide shouldn't have to be something to consider. Your life is supposed to be happy, but in reality, that isn't the case. There is always someone who can bring you back from the darkness, you just need to find them. In my opinion, I think that suicide isn't a good option, because there is always a reason to live. If you do think about suicide, just think about the fantastic future that you will have when you no longer suffer from depression, the pain will end one day.
To establish your emotional foundations after your loss, you will need to invest both time and energy in purging your negative feelings. It is important to deal with the guilt as soon as possible after the death. If ignored, the emptiness and torment which arise from self blame can be long lasting and debilitating.