Boyfriend and female friends

Just wondering how you other ladies feel about your significant other and his female friends. Normally I wouldn’t be opposed, but sometimes it is a daily and almost constant back and forth with multiple females. Sometimes I will even get cut off in the middle of what I’m saying in a conversation when he gets a text or Snapchat back and “has” to reply. I’ve tried talking to him about how it makes me feel and he doesn’t seem to see the issue I have with it and thinks I’m making a big deal about it and they’re just friends. Thoughts ladies??