According to Freud's dream interpretation theory, dreams are the realization of wishes, which means ... listen to me slowly.
First of all, just to make sure. Does your boyfriend listen to his grandmother?
If so, it means that you like your boyfriend very much and want to be with him very much; Let's guess: but have you had any conflicts recently, and your boyfriend is cold to you? Still have the idea of breaking up? If so, it means that you can't bear your boyfriend. This dream shows that you like your boyfriend very much and want to be with him.
If you don't really listen to his grandmother, then I will explain it according to my own understanding. Her grandmother represents the traditional past experience, which shows that your attitude towards marriage is still relatively traditional ... that is to say, it has not been opened ... In fact, your request is very simple, that is, to spend your life with your boyfriend wholeheartedly ... without asking much of others. That's all.
On the whole, you are still a little worried about your relationship with your boyfriend ... but this dream doesn't seem to predict anything special ... or what you said is too simple. I can only explain so much.