First year won't be easy. Dreams will haunt you for years, but you won't see them as haunting. You'll welcome them because they make you happy. Years will go by and things will change in your life and you'll have things that trigger thoughts of your friend...you'll smile or your heart will sink depending on the thought, then you'll continue with your day. It gets easier, trust me. Let the easing of the pain teach you for losses you'll incur later in life because they will come and you'll have to deal with those as well.
7 years after the death of a close friend of mine and I still think about him every single day. Seriously, every day he comes across my mind at least once.
I still have dreams too. He committed suicide and almost every dream is of us hanging out and him acting as if nothing ever happened. All I want to do is ask him why he did it but I can't. Something prevents me from asking. So now I just enjoy the dream since it always seems so vivid and real.
I was very emotional for a good 3-4 months after his death and I too truly believed I would never get over it. Well I'm still not over it but it has certainly gotten MUCH better and easier to deal with.
Trust me --- you will realize this too. It just takes time.
Very sorry for your loss!