boyfriend

i love my boyfriend but these past weeks have been so difficult. he speaks to other girls, girls that are into him. he had had previous history with one of them and the other has sent him ass photos and calls him hot. i feel like i’m overreacting because you trust him but he doesn’t get why it bothers me. why does he care about maintaining friendship with these girls, if we go to party’s he talks to them infront of me. it makes me very sad especially because they talk badly about me. please help