1. If you're 23, you're not "loose" down there, virgin or not.
2. Other than the absence of a hymen (which you CERTAINLY had at one point, since every human female is born with one), there is no certain way to assess virginity. Some guys might guess by other aspects of your behavior, but others won't.
3. If your virginity matters to a guy, you don't need to be with that guy. It doesn't matter to a real man, and shouldn't matter to anybody.
4. Faking is lying. If you feel like you need to lie to man in order to be with him, he's the wrong man.