The reason is that I never been on a boar hunt before and also it is part of my training.
We and the men set off to the boar's lair, during the hunt we discovered there were two boars, one which was by one of the hunters and the other one I discovered, unlike the other one we killed, the boar was even bigger and was charging at us. I shouted for help, no one helped except Horace, well at least he tried when he accidently slipped on icy patch of snow and sprawled helplessly. I tried to kill it but at least I saved him. I was almost at death's door but I saved by Halt's well-timed arrow.
Then the second years Attacked me and Horace saved me in return of the favour in the boar hunt. That's how me and Horace became best friends