Living with my newly acquired Tween

I don't when or why it happened, but my sweet, sweet, did I mention sweet, Jaxom has turned the corner to walk down a street that I am horrified to call Tweendom.

It has...
     Become embarrassing to be hugged in public
     Become embarrassing to be hugged in front of an open window
     Become a problem to be called in for dinner
     Made lying an everyday event
     Made talking to him impossible
     Made me cry at night
     Made me question every decision that I have ever made in his up bringing to this point.
     Become a struggle to keep him within sight of the front door as he joins his hooligans...er friends...yea friends
     Become impossible to explain why he can't tackle his brothers...or his friends brothers
     Made me feel out of touch with the youth of America...I don't know the cool, hip new lingo

I have known since he was a toddler that one day this day would arrive, but to be quite honest...I thought that Brenna would hit this stage before he would. He has always been a Momma's boy, always been sensitive, always been caring, always the first to speak up, always the first to tell the truth. Now he is the first to shout, first to break down into tears over spilled milk, first to blame a younger, less able to defend thyself sibling, willing to steal, willing to cheat. This is new territory to me so I am finding myself lost, lacking direction, and did I say lost? I don't know what to ignore, what to take seriously. I don't know what to let go, what to hold dear in our family values. Where do I draw the line in the sand, what do I do when he decides to leap beyond? How do I keep my temper in check?

I know that I was GOD AWFUL as a pre-teen (that's what we were called back in the 1990's). I would ignore my parents, I am pretty sure I coined the phrase in a minute, and my parents could actually perfectly time my catch phrase to mouth along with me. I know that I broke the rules, I know that I lied, I know that I wasn't always kind to my younger sisters. But I also grew up in quite a different world, and although we are still on Earth, though I am sure that sometimes my voice can be heard to infinity and beyond, and there is just so much to worry about now.

And since there were no boys in my family, my husband  was a compulsive hermit that avoided all human contact, and all my friends have kids younger than mine, I really have no one to turn to for advice. I do have good old trial and error, but that doesn't seem to be getting us any farther than the "you live in my house, you follow my rules, or I swear to bajesus I don't know what I am going to do with you," and "I swear I will find the receipt you came with" statements. My sarcasm is not helping this particular situation.

So World Wide Web...I need your advice. P. D. Q.