Yeah, this is the same kind of problem i am facing too... I too got this block stutter around 12yrs age and i managed till 12th class, but when i entered to college.. It is becoming severe, i dont have girlfriend bhut i have friends who i talk this too and to them i have less problem.. I too was a talkative kid.. But now i am here after vacation and i dont want to come here because of my blocks and i can't even say present during attendence in my class