Same experience in high school... Had a girl that, unlike nearly everyone else, treated me friendly, and was a good friend. Always smiled and laughed with me, while everyone else treated me like a nerd and a social outcast, to be looked down on..

We went on a school trip in a Business Club together for a competition & seminar week, with some others, and I got to spend alot of time with her, as it was at a resort/hotel place.

Then, she comes over to my room, and wants to know if she can really, really trust me.. I thought, ok, I really like this girl, I'm thinking she feels the same, since we've laughed, hung out together, etc, all weekend..

Finally, she says that what she wants to trust me with is... Keeping a letter to her boyfriend, that she intends to send, so that the girls sharing her room don't read it...

I'm lucky I managed a wavery smile & nod, before I about collapsed from having my heart forcibly extracted in such a manner..

The really sad thing is that when noone was around, I couldn't help but still read the letter, which only added to how bad I felt...

Naturally, it turned out her boyfried was an older, higher-grade guy on the basketball team, and I naturally just gave up on her, and just smiled & stayed a friend, knowing I kind of had no chance then... She was always nice to me, still, but I'm sure I never was able to smile & laugh with her the same way ever again...