Boyfriend kept his old crushes phone numbers?

My boyfriend of 3 years told me he has old crushes phone numbers that he liked many years ago. He said there is nothing wrong with keeping their #, because he’s never going to reach out to them and if they do he won’t do anything. Am I being insecure here? Yeah, he’s never reached out to them and he said he would never cheat on me but I think it’s weird… What do you think?

Boyfriend kept his old crushes phone numbers?
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