For future reference, don’t pay two enrollment deposits. It’s unethical. However, if I were you, I would go with Brown. Yeah you would be starting over, but it’s not worth it to stay at a school because of friends. Lots of people don’t even meet who will eventually be their very best friend until later on in college. You can meet that person at Brown. Three years from now, odds are, you would have a different peer group anyway, so why let that hold you back?