If you act right

I was talking with my boyfriend and asked him something and he answered me with "if you act right". So I asked him what that meant and he laughed and said you have to be southern. So I think I know what he meant but not sure exactly.

Guessing at what he meant. If you behave yourself -- act right -- you will get a reward. Act like you're somebody. Be a model of good conduct and dignity. And don't "act ugly."