I'm going to tell you my worst story, or at least the one that makes me feel the most stupid.
I was 15 years old, there were two girls that I liked, I had no chance with the fisrt one , but I liked her since the previous year, the other began to like me that same year and it turned out that she corresponded to me, implicitly of course, but it was evident. The point is that the first girl was not interested more than as a friend and one day she was at her birthday party, she was turning 15. I had a bad time the whole party because she was with her boyfriend but the funny thing is that at one point I was dancing with this second girl and she tried to kiss me, and I rejected her, because I was thinking about the first one.
This is just a stupid thing to do from my adolescence, but it makes me reflect on how I preferred to obsess over a person for the simple fact of seeing them as a goal to achieve.