I sent them postcards so you know it's true
I promise that I wouldn't get emotional
And I'm not, so stop it
She knows that Joey misses her because he sent a postcard to her. But he doesn’t want to get emotional, so he is telling himself to stop it.
To help improve the meaning of these lyrics, visit "Pennyroyal" by Joey BADA$$ Lyrics and leave a comment on the lyrics box