I actually quite liked this, more for the realistic factor instead of the actual yuri itself. Reminds me a lot of how I am/used to be - it's quite easy to get caught up in something but then when you actually get it, sometimes it doesn't play out how you hope. In this case, it was pretty obvious that she just had a schoolgirl crush on this 'older boy' and when she actually realised (like properly realised) that she was a girl, and an older girl who liked her far more than she did, it's qutie easy to feel trapped and freak out.
I mean, she was only like 14 or something as well guys, small steps small steps. I would like to see like a time skip with her though, maybe see if she gets with another girl when she's older.