Get your parents and sort him out for good, or practice more martial atrs and do a axe kick in his face, am not 6 foot but I can kick whooo everybody in this world.
Hi, Give them so tasty sweeties and let them play a game of folding their eyes and using their sense to touch other student. Let them played with some equipment etc. From a student that enjoys practicing with instructors.
I don't smoke nor drink, drink normally but don't over do it, just enjoy but don't go drunk. You should not drink alot of amounts of alcohol when goes lesson you might affect other student and harm yourself but just enjoy what you do.
Try to sit cross legged and get someone that weight less than you to stand on your knees and push you down do this rugulary, try sitting doing a vertical shape or even better a split and try to touch your nose with your knee. Am not sure if my advice is helping you, just do what you're comfortable in.