9 Terrifying Things Jealous Girls Do

7. Getting mad at him for taking a trip with his little sister “because she’s a girl”

“That’s just crazy, right? It seems like some kind of mental illness.” When your jealousy is targeted at someone who isn’t even a potential interest, that’s a big turn off for lots of guys. For your boyfriend, his little sister isn’t even a woman at all. At least have enough security in your relationship to see him off for a family trip without getting upset.