OK so I'm Jealous. what do i do now?

yesterday afternoon my boyfriend and his mom. was going to go to a BBQ. for is manager at his work because he is moving to a different state. so the bbq was at this girls house,. when we got there my boyfriend made me play vollyball. which i never play sports. and i noticed that there was all really cute girls. 15 year old is brooke, 16 is avry and 17 was mandy. so the mandy is ugly. and avry is kinda pretty. but my boyfriend says that it looks like she got beat by a ugly stick. and brooke is like really cute. after the volleyballgame. we went and sat down. and they started a watergun fight with the little ones about the size of your hand. and brooke had on in her front pocket. and she came over by my boyfriend which i was on the other side of him. and she was getting food behind us. and my boyfriend grabed the gun out of her pocket and so he started her and they was talking the whole time.and later last night i talked to him about it and he was like do you know her.