T.S.
I guess I should warn you both right now!
I subbed in the junior high last year. I have raised 4 junior highers. In the school we had one boy request sex from a girl. One girl boasted of a relative (in another town) having an abortion without her parents knowing. A few kids boast of their weekend drinking parties when they 'tagged along with brother'. The parents had no clue! We caught wind of these things because we were hearing the kids discuss it at school.
These kids do know about sex and do experiment. I was very careful with my kids. I never let a jr high kid out of my sight unless they were with another adult I absolutely trusted would watch them. That meant no football games (without me and they sit with me). That meant no dances unless I chaperoned. That meant no sleep overs unless I knew the parents were as paranoid as me. It is tough but it keeps the kids pure and you less worried.
There are parents out there that think this is all cute and fun. But it won't be fun if they have a 14 yr dying from AIDS, alcohol poisoning, or drugs.
Talk simply to your kids and confront them. Don't be afraid to say anything including the 'words' we tend to want to whisper.
I had a talk with my 14 yr old last week about the newest drug out--canned air. They inhale the can and get a buzz. Then if they do too much at once they die because their system cannot process oxygen properly.
Anyway...talk to your kid plainly about it all. Don't tell him he is too young to be in love-he will hate that. Do tell him that it is a young crush and yes girls are cute. Tell him it is okay to like girls like that (we are made to like the opposite sex) but it is not okay to ever go beyond that. If he says you are not letting him have a life, tell him he is 12, he has not earned the right to have a life yet. Junior highers don't 'get a life' yet. LOL ;-)
Good luck,
ts