[NLY]

Well, if you think about it, she would of found out sooner or later. What if she wanted to go swimming? or another physical activity that involves lots of sweating (sex?)

Your first mistake was lying to her when she caught you. If your response was a simple "yes", I'm sure she wouldn't make such a big deal out of it and tell your guy friend.

And to be honest, nobody is perfect. We all have our imperfections. If you're afraid your girlfriend would leave you if she found out you had pimples, well; this relationship probably won't last too long and I'm not sure why you would want to be with someone so shallow.