petty or not? 😒

Becca
Okay, so my fiancé has over 100 girls on his snap chat. He doesn't talk to any of them that I know of. Would it be petty if me to ask him to delete them? They are his past and like I said, he doesn't talk to them. So why keep them? 
It kinda bothers me when he checks to see who watched his story and all I see are girl names. 
Be 100% honest with me. No hard feelings. I just want another females input. 
By the way, I have no guys on snap chat. I deleted them in the beginning of our relationship, and he didn't ask me too. I just did it.