Title does not tell much, but... I'm in kind of love, and... I guess it's normal to be, but...

...I'm 13.

I might be in the middle of adolescence, but I just want to ask that
1. Has it happened to anyoe else?
2. Should I just wait until I'm older? Might be risky if different classes and even schools might get to the way. or...
3. Should I perform "action"? Oh, don't take it the... "bad way" please. ;D