I'm asking because I cringe about the way I acted when I was in my tweens/early teens. I became a lot more mature at 16 and realised how to behave a bit more sensibly.
I won't go into too much detail but when I had my first proper crush in year 7 I went around telling everyone how "in love" I was.
In year 9 I was unhealthily obsessed with a crush, so much so that when we had a falling out I kept on sobbing and asking for forgiveness.
Fortunately after getting thoroughly teased for my behaviour I learnt how to behave more normally and how to handle relationships in a more mature manner. So much so when I've had crushes later on, I've acted completely sensible and been able to remain friends even if they said no.