The best thing I can say is let your emotions run. They're there for a reason and you need to express them. It is also normal to feel like your emotion is wrong. "I should be crying more!" is one thing people think, but everyone handles this differently and the days where you will be crying may come. Or you may laugh and be mad at yourself for laughing, but again everyone handles it different. Just whatever you do, let yourself feel how you feel.
Don't think that you wont see him again. You'll know when you are reminded of something he does, or see something he likes, or smell or hear something that brings him to your mind. That's him being there. He is a permanent link in your life and can never be taken away. You would not be the same person today if you didn't have him, and those traits are also him. Make him proud to be his brother and never think "He WAS my brother." Because he is and always will be your brother, his passing doesn't change that.
He was younger than me. I can't even imagine what it must be like to lose a sibling. The first year of "Firsts" will be very hard to get through. You know I have been through a lot of passings in my time, if you need to talk feel free to note me. There's no easy way to cope but having a shoulder to cry on is always a big help.
One big holiday down and one to go. My work had to prepare 48 meals for up to six people. Christmas will be bigger. It always makes me think, if the store would let me make things MY way it would be better. I even have some really good recipes for unique meals.