Hey, that sounded like me like when I was uh hrmm 22?
But we all learn! Damn that Everquest =( (and btw, eq is teh debil)
But anywho's...
His priorities are in line to what's in his life. Ie, he believes that you'll always be there and take whatever he'll dish out.
As for being 30 and still living at home... Houses are expensive =( Unless you live like in uh, Skokie Ill or somewhere... Even then it's expensive if you haven't been planning.

I think breaking up is the best thing to do, but you have to stick to your guns. And if he is tripping off "Jim".... let him =)
Guys mature a little slower...
Some slower than others...
Some just need motivation...