Did it ever happen to you, that somebody you thought to be a faithful friend turned out to be... no, not an enemy, not a rival, but... well...
Imagine, you've got a friend and you thought of him as of somebody beyond the normal stereotypes, le.g. like being especially nice and understanding towards slim and good-looking girls.
And then, imagine, this "faithful friend" doesn't find the time to explain to you the school material when you're sick, but finds the time to help another female friend (NOT girlfriend, and certainly not intending to date with her) who isn't as close friend for him as you, with her preparations for exams.
Well, what