Dream of

6 months ago my husband of 62 years passed away. About 30 days after his passing I had this dream that a unknown male dressed in all black appears in my bedroom. I have had this dream 3 other times since. in the dream the man asks if I'm alone, and when I reply no, he either says he will be back at night time to visit with me again or to sleep with me. It is making me very scared and uncomfortable in my own home. Please if you can help me interpret this dream.