In big need of some advice...!

Well in all honesty this is never an easy process for anyone. Many people move on in different ways. Some distract themselves with things they love, hobbies, projects that sort of thing, whereas others move on when they meet someone else.

As someone who is going through this process, nothing is more powerful than the love of a dear friend. Someone I can talk to should I break down, someone to assure me that I will be alright. Hence my advice to you would be to just be there for him when he is upset and talk to him and tell him how amazing he is and someone else is out there for him. Take him out to a movie or for some coffee and just talk about stuff that he enjoys, I'm sure he is passionate about things so just help him focus on the good in life and slowly you will see his pain wash away :)

I wish him all the best, we all deserve someone and all this heartache we go through, serves to help us appreciate someone more when we indeed do find that someone. In tragedy there is always hope so just reach out your hand and walk with him till he can walk on his own.