My boyfriends a baby daddy HELP! 👶🏻

My and my boyfriend are juniors. We went out last night and he had the baby with him (him and his previous girlfriends) she's only 2 months. She cried the whole time. I love Callie but she kills the mood and when she doesn't, her mom (baby mama) does she texts him at least 50 times while I'm with him. If he doesn't tell her I'm with him she doesn't text, it's only when she knows I'm there and this weekend me and him are going to go to the beach house with his parents and stay the night, WELL... he accidentally told her and she said he had to take Callie or she won't let him see her anymore! That's so unfair! 😡 she also texts him and says he could do better and that I'll never be her mama (WHICH I KNOW) but I spend the most time with her! So now my weekend will now consist of Callie screaming and her sleeping with us ( which I love cuddling her!☺️) him in a bad mood because Maria won't stop texting him and Callie crying, his parents evil stare when I hold Callie (which I do 80% of the time)!!!!! 😭