Ouch. I'm sorry to hear about your injury. It's completely understandable to be a little nervous around him after that, even if you logically know that it wasn't his fault and that he didn't mean to be aggressive toward you. On the bright side, at least this was an "extreme" situation that hopefully won't repeat itself.
I've had a few bitey cats in my life. Before I was born, my parents adopted a cat that seemed to think she was queen of the house. When I was born, she had no use for me except getting rides once I was old enough to push her around the house in a wagon. She was the type of cat that liked to knock stuff down just to spite you, and she had no problem smacking people with her paws and, occasionally, giving you a bite. She never really hurt me, except for a time when she knocked a file folder off a table I was playing under and it scratched my eye (and while she was very smart, I don't think she intended that outcome). But I grew up knowing to keep my distance from her. When I was two, we adopted another cat who was a total sweetheart, but she liked to bite. She had that petting aggression where one minute, she'd be happily letting you pet her and the next she'd be snapping her jaws. So I was careful around her, too.
When I was a little older, I got one of my current cats. He's very loving, but had a bit of a temper problem when he was younger. And he's always been prone to lashing out when he's stressed or scared. Sometimes he'd just be a jerk--I remember him trying to scratch me if I told him not to do something, and he tried to swat at my mom for telling him to get off a table. Sometimes he'd follow me around making angry noises like he was looking to start a fight with me. Other times, he'd just get scared, I think. He was scared of one of my uncles because he knew my uncle didn't like him, and one time when my uncle was over at our house, my cat jumped up and grabbed my arm, causing a puncture wound with one of his claws. I had a scar for a while. He mellowed out a lot with age, but even now as an old man, you have to be careful when he feels threatened. I had to take him to the vet recently for an ear infection, and I was so nervous that he was going to bite or scratch the vet. Most of the time, though, he's a total sweetheart who wants nothing more than to cuddle. Though, one time several years ago, he gave me a "love bite" on my nose in the middle of the night to try to wake me up, and while he didn't mean it aggressively, he drew blood a little. Since I'd been fast asleep, it was pretty startling and I freaked out (this was also around the same time that the story of a French woman who received a face transplant after being mauled by her dog was in the news, so my first thought was that my cat had bitten off my nose). I ran to the bathroom expecting to see a bunch of carnage, but it was just a little scratch. When I went back to bed, my poor cat was scared because I'd freaked out, so I ended up having to comfort him.
It'll take some time, and I can't be mad at her. As everyone else has said, it's instinct. I won't give up on her, though. She's trying hard to suppress it. But I do flinch when her jaw opens. I have to work on that, but it's hard.
