When I was just exiting High School me and my twin weren't the best of friends. At the start of High School we did everything together. But towards the end... we started fading, and in 12th grade we were both fighting over a girl and who got to get her and ultimately at the end of 12th grade he got the girl and I wasn't too happy about that.
I had been friends with this girl since 3rd grade, when she first moved to our area, and he hadn't taken a liking to her since that year. Basically, you could say I was friendzoned.
Me and my brother looked incredibly alike (We're twins, obviously) and more than once she mistook me for him.
They were together that entire summer. It was absolute torture to see my brother and the girl I'd liked since 3rd grade together, kissing, hugging, cuddling. I even heard them having sex once. I'd never been so depressed and jealous in my life. That entire summer was one giant heartbreak.