My condolences on your loss. I lost my 21 year old son 3 years ago and it nearly crushed me. We were very close and didnt think I would make it through it. I think about him every day and miss him all the time. For me, concentrating on the good things when he was alive, meditating, talking to my wife (he was her stepson), and keeping myself occupied helped me through it. I also felt his presence alot and know he wanted me to move forward. Nothing can prepare you for losing a loved one and I wish you all the best.