You probably read the title of this post and thought: "Wait, what?"
That's what I thought when I saw this article.
The gist of it is that it is very, very common for someone to hallucinate when under stress and the death of a loved one produces the highest levels of stress. Their research showed that 80% of elderly widows/widowers had an hallucination of their lost spouse. Only one fifth did not hallucinate!
Mostly I share this to offer some normalcy for those who have gone through grief or are going through grief. It is normal and natural for you to hallucinate and to see the person you lost. The vast majority of the time the hallucination is experienced as a comfort. This is normal and sane and perfectly alright. If you have lost someone close, I am deeply sorry for you - I hope this offers some comfort.