Hmm..
1. She has a boyfriend
2. Shes flirting with you and "catching" you changing clothes
3. She's a great girl
There have been sooo many times where a guy will tell the same story. Met this "great girl" but (sniff, sniff) she has a boyfriend! But hey, she really must like me! She always flirts with me, she always talks to me etc. And hey, I hear that her boyfriend is a real dick anyway.
1. Don't be That Guy.
-Don't be the guy who will make the excuse that even though this girl has a boyfriend, he just must be an asshole. And hey, she flirts with me anyway, so whats the problem?
2. Is she really a Great Girl?
-I'd say not. Do you want to become her boyfriend, only to have her flirt with the next guy? And then that guy will become you? (do you follow?)
I'm not trying to dump on her or you. Hell, I don't know you folks. You may be great, she may be great, and her boyfriend may be a baby killer. I have no idea. But the simple fact is that she's taken. And do you want a girl who would flirt with somebody else while already in a relationship?