The other day I was talking to someone that I'm trying to become friends with. I was making a bunch of jokes and they were laughing at them, but how can I know that they were laughing for real and that they don't actually think I'm an unfunny dumbass that they just barely tolerate? Did I fuck it all up?
That's like asking how you know if someone is a cheater. You don't.
Put your insecurities aside and let it go.
