well if she did anyhting then she cant be called a friend can she. personally the term i would use for such a person is bitch!! its common sense that when your friend has a boyfriend you do not go and do things with them! not unless you want to lose that person as a friend! im guessing you have a friend you don't trust and if that's the problem then there is a simple solution; get her out of your life!!!!
I would say yes :)
We would be standing with our backs to each other.
Generally not. If you have to do it behind their backs it means you believe they would not approve. If both parents disapprove there is a high probability that they have a good reason to disapprove - which means you shouldn't be doing it - behind their backs or right in front of them - or at all.
If you have a boyfriend why would you go out with anyone in the first place??
You are not related to your boyfriend's sister, although you and she may be friends. If you were to marry your boyfriend, she would be your sister-in-law.
I would be mad, and upset, and confused.
If your friends are warning you that your boyfriend is not a nice guy and you should break up with him then they are seeing the reality of his character and love has blinded you so it would be a good idea to listen to your friends. If your friends just think he does not fit in with their crowd and your boyfriend is a nice guy, then your friends are not your true friends and you should remain loyal to your boyfriend. Be wise, take a second look at your boyfriend and consider what your friends are saying about him if they don't feel he treats you well.
If you are starting to like your friends boyfriend then I would recommend not trying to get into any relationship with his/her boyfriend you might be rejected and either way you will more than likely loose your friends relationship.
They faced the pyramids, otherwise they would have been working behind their backs!
I would still be friends with them if my friend would still talk to me.
That would probably be a good idea. You can't let him push you around like that if you're not going to push back.