12 years old is one of those crossroad points where it could go either way. When I was 12 and entered 6th grade, at the onset, I was mildly interested in girls. They'd call my house and ask for me, and there would be one talking and a bunch giggling in the background. It'd usually go something like this:
Me: "Hello?"
Them: "Hiiiii."
"Hey."
"Soooo what are you up to?"
"Uh, playing Sega with Mike."
"*whisper whisper whisper* *hee hee* Do you want to come over?"
"Uh, well, we're eating pizza and playing Eternal Champions... my parents got me the Sega Channel so I can play like a hundred games and stuff. It's really cool."
"*whisper whisper whisper* Do you think Marlena is cute?"
"Uh, I guess."
*muffled laughter and giggling* "Marlena thinks you're cute."
"Oh, cool."
"Do you want to come over?"
"Uh, no, I think I'm just gonna stay here and play Sega."
I have no doubt that as soon as the phone hung up, they were like "UUUUUUGH STUPID BOYS!"
Fast forward another four months, and I would always try to get behind certain girls in line so I could check them out and watch them walk. I was like, "whoooooooa." I started being like this way before most of my friends, and it was the sort of situation where if I was out riding my bike with my friends and we passed by a group of girls from school, if they called out to us, I'd stop and go, "Hey." *blank stare*
Them: "So what are you guys doing?"
Me: "Uh, riding bikes."
Them: "Where are you guys going?"
Me: "We were gonna go try to catch some snakes out in the woods."
Them: "Eeeeeeew snakes, uuuugh."
Me: "Snakes are cool."
Them: "Do you want to go up to Circle K with us and get a Slurpee?"
Me: *looks at friends* *looks at girls* *friend has an 18-speed mountain bike* *girls smell nice and have pretty hair* "Okay."