I understand you want to be balanced, but a guy invading your space is fundamentally UNbalancing, you know? I hear that you are disappointed with your reaction, but are there parts of it that you are happy with? Personally, I think being able to tell someone to back off is a HUGE thing, something many women are unable to do. It seems like you are feeling guilty for standing up for yourself (that's how I get, anyway). There's no one perfect way to stand up for yourself, especially in a surprising and unsettling situation.