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Incoming wall of text.
I've actually thought about adapting this period of my life into a short story or novel.
When I was in my later teen years, I worked as a counselor at a Lutheran summer camp. This camp was the best thing to ever happen to me in my life. I grew up being told pretty regularly what a useless sack of crap I was and this was the first place that I felt valued and respected. Most of the staff were former campers, like myself, and at the time I had come to become very close friends with a guy we will call Luke. I never knew what it was about him, but we just kind of clicked.
I had recently to the realization that I really was gay, and I was accepting it pretty well. I'd come out to a great many of my friends and family and though there were some rocky times with my mother and some very uncomfortable situations at thanksgiving and school, I was taking everything in stride. But here at camp, the entire staff knew me and accepted me with no questions asked. This summer, I'd found myself thinking more and more about Luke and my feelings for him and what started out early on as a friendship was evolving to much more... at least on my end. It seemed as if Luke and I were getting close to actually forming some sort of relationship. That was until our friend Sue brought her new boyfriend to work at camp that summer. He was a nice enough guy. He kind of looked like Johnny Galecki from Big Bang Theory.
The summer was just starting out and that meant orientation for all the camp staff. What I didn't know was that on that staff trip, Luke and Sue's boyfriend.... well.... "had relations". What ensued for the rest of the summer was a clusterfuck of biblical proportions. We had Luke and Sue's boyfriend conducting a secret love affair. Sue wondering why her boyfriend was being so distant all of a sudden, and me, pining over Luke. In the whole love... quadrangle?... I was the only one who was going through it alone, and the only one who wasn't getting any. Worst of all, due to my "you're so easy to talk to" nature, all three of them were independently confiding all this to me.
Eventually it all came to a head, with Sue finding out about the affair. They attempted some sort of Gordian Knot sort of 3 way relationship that ended up with all three of them miserable. I was consoling all three of them, and of course no one was consoling me at all, because they were so busy sharing their burdens with me that none of them even realized that I was carrying any burdens of my own. In the end, we all ended up kind of going our separate ways.
You may be asking what this has to do with the price of tea in china. That brings me to the regret portion.
It wasn't until years later that I reconnected with Luke and finally had the balls to tell him that he was my first love, but knew nothing ever would have come of it. He turns around and tells me that I was HIS first love and that he regretted that we never ended up together.
So, yeah, that's my "that girl" story.
TLDNR version.
Opportunity is not a lengthy visitor, and what you think is so and what is actually so are not always in sync with each other.