I feel for you noonehome. But at the same time, YOU are the master of your destiny, YOU are the captain of your own ship. No one can do that better than you.
From my persepctive, you did absolutely and totally the right thing on the phone with your friend. She asked, you were up front and honest. As soon as you can own that, you will feel your power come back to you. You did nothing wrong and you have nothing to back down from. Just be nice, as I am sure you are.
I realize that you are still young, but this is also the time of life to realize that you have to make your choices and decisions. This is not being unkind and not being not nice to the people that you care about. For what it's worth, here is my reply to the elders. "I am declining the offer to study. You guys are great, and I thank you for the offer, but I already know what is in the brochures. Reading them again will not make any difference. Thanks just the same." It might sound condescending, but I would be inclined to add, "I know this is the best you have to offer, but the brochures are one-sided and leave out any facts that make a case for the other side."