I was trying to write a chapter for With Angelina, and started along the same lines, but you can't cut a letter like this into 100 words, so here's the uncut version.
Fred,
It's been five years. Five years on my own.
Have these five years been as hard for you as they were for me? It was hard, really hard, to carry on without you, and for a long time I didn't think I could. I made everyone really worried, when they were mourning for you too. But no one else could even begin to understand how it feels to lose a twin.
My days passed, each the same as the next. Mum and Dad convinced me to move back home again, but that just made things harder. Everything reminded me of you, Fred, and all I could do was sit there in our room, trying to ignore the pain. Six months of my life simply passed me by before I realised what I was doing to myself, to everybody.
Angelina never left me though, even when I tried to push her away. It took me a while, but she helped me move on, and I realised I loved her. Turns out she loved me too because she married me, Fred. Even after she saw me at my very, very worst, she married me.
And you're going to be an uncle now. Angelina just told me. I think that if it's a boy, I'm going to name it Fred. They're going to know all about you, and how you died fighting.
The shop is going well right now. I let it go for a while, but it's much bigger than I thought it could ever be, and it can only get bigger. Everyone comes in and helps regularly, especially Percy. I think he still feels guilty about everything. No one understands my ideas as well as you did, but they're trying. Really hard. And I appreciate it, although it should be you helping run the shop, not them.
But Fred, I really miss you. I miss your jokes, your smile, your laugh and I miss you being here next to me. I just want to hear your voice again, and tell you that I love you. We never even got to say goodbye. It's getting easier all the time, but I used to pause in the middle of sentences and expect you to finish them, and every time I looked in the mirror, you stared right back at me.
Everybody else misses you too. Mum still makes you a jumper every year, and you have other nieces and nephews who would all love to meet their Uncle Fred.
I know that you are probably having a great time up there, with Sirius and Harry's dad and things, but I really wish you could be here with me. Is that bad of me? I'm happy with Angelina and a baby on the way, but if you were here too, that would just be perfect. I want you to be as happy as I am, with a wife and kids.
But that's not going to happen and what makes me so sad is that my kids aren't going to know how fun it was with you around.
I know you're never going to see this, but I love you.
Your twin, your best friend, your partner in crime,
George