You are aware that your brother in law, now deceased, was a positive influence in your life, and you miss him.
I would not interpret this dream as a message being sent to you from the afterlife. It merely reflects your emotions.
This dream illustrates the dreamer's feeling violated by somebody who should be protecting her/him.
It is not possible to provide an interpretation without some information about the dream itself. However, because a dream is always about the dreamer, it is safe to say that "your friend's dream" is about "your friend."
If you didn't have recently images or thougths about unicorns then it could mean that your higher self protects you from your impulsion.
The dream means that something - perhaps a subtle sound, sight or odor, reminded you subconsciously of your friend, and that memory appeared in a dream. It does not necessarily mean that the friend is actually sick. All the same, the dream gives you a fine reason to call your friend.
It simply means that you dreamed of your friend at the time that he died. Such dreams are fairly common and should not be taken as signs of anything other than what they are.
Something you know needs protecting.
The dream merely illustrates your natural affection for your friend. You could use the dream as a fine excuse to get together and have a long chat with your friend.
It means you are part of your friend's life. That's a good thing, even if the dream is weird. They usually are.
It might mean that you are really good friends or that you have a sexual attraction to that friend.
that im going to get with him
you dream about what your worried , exited or thinking about
Your brain is trying to tell you that this so-called "friend" of yours doesn't really like you and you should stay away from her. And about your other friend, continue to be her friend because her friendship is genuine.