My friends are wild

I had two best-friends. One my boyfriend went to college with. She was wild back then. She’s has two kids and divorced now. She’s still wild but you know a milder version.

The other, ex bestfriend, when my boyfriend came into the picture she was cheating on her girlfriend. (We are no longer friends anymore for other reasons.) But that can leave a impression on a person.

He recently started asking me questions about how each of these persons influence me. As if he’s worried that I am going to cheat on him.

I’ve never been that person. I honestly tried years ago and their philology of dating do not work for me.

How can I assure him that he is the only person I want to be with?