Female friends

Jaimee • Livin` life
My SO and I are LDR and at first everything okay. He only hung out with guys and it was great. Now, he's always talking to girls. Even if they are friends of his roommate I still get uncomfortable... Like I feel like I'm over reacting but I just get so mad. If we're texting and he's texting his female friends too. UGH I HATE IT!!!!!!!!!!!! but we don't talk as much so I don't want to fight. But what can I do to stop getting like this?