Her boyfriend is her boyfriend. She don't give a fuck if it's immature of her to get jealous and territorial of her man because that's her man. That means no other girls out there should be texting him as much as she is, that means no other girls out there should be around him as much as she is, and that means no other girls out there should be acting like they're his girl because he only has one girl and that's her. She isn't afraid to let them know what's up. If she has a bad feeling about her, she's gonna tell him that she doesn't want him talking to her or and hope that he won't out of respect for her and it not, she'll step in and tell that girl herself. It's not that she doesn't let him have friends that are girls, it's just she would feel more comfortable if they were girls who she's also friends with and if they were girls she trusted. Other than that, she would do the same thing for him if he were to ask her to cut off certain guys so she expects him to do the same and for other girls out there to respect their relationship.