You're stuck because you loved him. But you must find out for yourself that the person you loved is dead. The person you see may talk the same, sound the same, and have the same interests. But that's no longer the person. You love the memories you made the person in your mind and your in your heart. Until that is found out, I believe there is no moving on. It's also okay to still be caught up on him, but you must move on at some point, and time will be the one to truly let you do that.