over thinking it ?????

HELP! I'm on period so this could be me totally over thinking this, but my boyfriend has this friend named cat and they text and Snapchat a lot. I've had multiple people tell me that there's Nothing to worry about. But still I find it werid that they text and Snapchat often like everyday often... I'm not the jealous type I have guy friends and I'm fine with him having friends that are girls, but I don't text my guy friends everyday .. So I need advise.