My dream last night was so wonderful to me! My new boyfriend was being introduced to my mother and both grandparents (they are all dead in real life)
I just wonder what it means

Dreams like this are always pleasant to recall. Seems like someone is giving you permission to be happy about this boyfriend. You don't say that your mother or grandparents were displeased in the dream - I can only surmise then, that the meeting was "good".

If your own intuition is coming into play here, you must be extremely comfortable with this young man, and would be willing to introduce them to your mother and grandparents were they still with you.

It sounds like you will have a very pleasant future.

Can you recall anything else?

Also it's very common that your unconscious, dreaming mind will make no distinction between people that have died and those that are still alive. Dreams are all about images, symbols and their attached emotions – so if your mind wants you to feel how you would feel if you were talking to your mother for instance, it will always use the image of your mother for those situations. It could be anyone though, even people that are famous that you don’t actually know. In this case though obviously your family were the only ones that would fit the bill for what your dream wanted to portray, possibly because your unconscious mind felt that you were lacking the opportunity in waking life that other people get to experience. Very often I will have dreams with my grandparents in them, not realising until I wake up that they are no longer alive – it’s usually a very positive thing for me, less disappointing that they are no longer alive than it is uplifting that I got to see them again.

When I have dreams about dead people, which is not very often I always feel very angry and frustrated because I know that they are meant to be dead. Even though I liked the person very much, and miss them not being around in real life; in the dream it just seems very wrong that they are alive, and very important that they go back to being dead. I guess it is just the lucid part of my dreaming, that I know what is supposed to be the truth in real life.