Slytherins. This fits me: when i broke up with my best friend, he didin't told me why. So I spent plenty of time trying to understand what happened. I couldn't just give up, even when the situation seemed hopeless. After two years, two fucking years of stubbornness, I found the answer. He had fallen in love with me. Now that I had the answer, I moved on, knowing that he loved me until the end.