Oh my god I'm so sorry D: it's so unfair!
Only the best are taken from us before their time. I know that doesn't make the pain any less but you will in time be able to look back and remember the good times, not just the pain. The pain may never fully go away, but you will get stronger, and it will get less. Time heals all wounds.
We all are here for you.
Having a bracelet made from his hair is a wonderful idea, I will be having one made from each of my horses' hair [I want Magic's mane because it has all the pretty colours in it but that may not be long enough] when I have some spare money because I know that the last time I lost a horse it wasn't until months later that I even thought about wanting some of his hair for a bracelet or a pendant [I've seen them made into necklaces so that's an option for shorter tails or for mane hair].
It's two years now since I lost Latte and I still think of him often but I remember him fondly, the pain is gone or at least almost gone. The videos I have of us together are hard to watch because it's embarrassing how bad of a rider I was, not because it's hard to watch him and know I'll never see him in person again.