Do we have spirit after life?

Many of my loved people like my mother,my grandmother, my aunt have died, I love them and think of them, and hope people still have a life after death. When I dream of them, I don't know if they are really come to see me or just because I think of them? One day, I dreamed of my grandmother, she said "I am awarded to be the kindness god, and I am living in the apartment of green leaves, room 203. When I awake, I search in the web and cannot find a place called green leaves apartment. I even call my father and let him tell me if he can find an place called 'green leaves apartment'. You know, every weekend, I go to China Town to buy foods, half year after that dream, when I am walking in China Town, I looked up and suddenly find the apartment before me is called 'GREEN LEAVES APARTMENT' exactly! It is a 4 layers of old building, I am sure the room 203 does exist. But I am so scared and didn't go upstairs to look for my grandmother. Who can explain to me? Do people have spirit after life?