I don't know for sure. After my mother and father's death, I felt my mother being with me every now and then for about a month after, where I could smell her and sense her. But if it was just my mind, I don't know, as my step-dad had the same feeling, sometimes at the same time as me.
I hope I will be reunited with my parents, and on sad days even want to commit suicide, just to see if anything would happen.
But as the atheist I am, I also find it very hard to believe that you "live" after you have died, so I have mixed opinions.