You all know that being selective about who you allow into your life IS A GOOD TRAIT. I have noticed that those who don't limit have a lot more issues in their life than those who do. That was a good thing to learn.
I have always been selective though sometimes after the fact rather than before....but I remove those who mess with my peaceful life & don't let them close if I sense that in their personalities. Learned long ago that I can be nice to people without making them a best friend or anything more than a casual acquaintance