Boyfriend

What do you do when your boyfriends friends do not like you? My boyfriend has a girl that he texts all the time and he set her up with his best friend. They hangout all the time the three of them but without me because I’m busy at work. I feel left out. I later on caught him texting her saying goodnight❤️ and it obviously bothered me. Her and I now do not get along even though she texted him goodnight❤️ first thinking it was no big deal. I know there’s nothing between them but she hates me now for starting drama that was her own fault when caught. What do I do?