1st time Meeting your Boyfriends parents!?

Im going to meet my Love's parents pretty soon.. Ive been with my bf for about a year already & i have never met his parents or a family member at all only his best friend. So I'm a little nervous but I really want to meet them, can anyone shoot me some good tips on how to act? I'm pretty chill I got humor, im quick-witted, I'm a bit conservative w/ the clothes I wear & I'd like to set a good first impression lol Thanks in advanced!