I was at an all girl's school. Not that this would preclude the absence of crushes, but I can't say I ever had a crush in my entire life, or that I am crush-material for anybody else to have a crush on me. To be honest, crushes were not topics of conversations back in the English seventies....At least, not to my knowledge.
Sadly, I can only imagine too well that the thrill will be gone too soon after it hits you. It is not a good thing: for it makes you very reticent to want anything much at all. My sister aces me in this low-brow approach to life, though. I am fortunately a little more mercurial.... Again it may also be a typically European thing not to want too much of anything (at least not out loud). And a Brit will never confess to no longer wanting something they expressed wanting. The stiff upper lip prefers to grin and bear it.
In view of all this, I read your diary entries with much amazement (at your precocity).