I'm so sorry to hear about your fish! The same thing happened to me yesterday, I came home and found my first pet fish, Fern, dead! It was horrible, and I feel like it's my fault for some reason. If it makes you feel any better, Fern was only in my care for 6 months...a year is much better than that!
My boyfriend and one of my brothers keep making fun of my sister and I because we are so upset about Fern's death. No one takes it seriously, and it's really frustrating. I've been getting a lot of the "it's just a fish" treatment too. Why are people so ignorant? :[