@Phoenix32890,
Look, we don't even know how old this dude is. In spite of growing up with sisters and considering myself pretty open-minded about the nature of adult relationships, I had similar feelings during my first one, though not about clothing per se. I immediately recognized them as irrational and certainly not worth voicing to her. But I worked with her in the restuarant her dad owned, where she had grown up, where old boyfriends knew they could find her, and I worked with a mostly male staff, including one shitface who actually had the balls to say to me: "You know everyone wants to **** her, right?"
It's not uncommon for people in their first relationships to be overly concerned about losing the other person. For dudes that concern may manifest itself as it has with this particular cat. To whom the only advice I really have to impart is this: eventually you'll find out not only that worrying about **** like this is liable to turn her off, but that keeping cool and not tripping about other dudes, and actually
believing that you're such a badass that she would never in her right mind leave you for some douchebag, is really going to turn her on.