HELP!!!

Okay, so I understand the concept of forgiveness. Normally speaking, I would say that I'm pretty good at it. But lately I've been wondering... how many times do you need to turn the other cheek before it's okay to take a step back so they can't hit you anymore? The scriptures say to love those that despitefully use you... is it okay to love them from far away? President Hamilton said, "love is never wasted, even if it's rejected"... is it okay to love that person, but not want to be around them or talk to them? I'm really struggling with this. I always thought I was the kind of person who could deal with anything from the people I love. Go ahead and use me. Go ahead and be mean to me, ignore me, make me feel like crap, it's fine if you don't care about me as much as I care about you... that's what the Savior did- right? So, I thought I was fine with it. I mean, I certainly don't do as much for my friends as the Savior does. So, if it happens to Him, it's fine if it happens to me. "if they hate you, they hated me first". But I'm at a point in my life where I have so much wrong with my life that one little comment, one little slight- is enough to push me over the edge. So for the sake of my mental health- can I be mad at someone, for once? Can I be rude and snide and make them feel bad for making me feel bad ALL THE TIME? I always think that when people are mean, it's because of something I did... but maybe, just this once, can it be just because they are mean people? Because I honestly don't think I've ever done anything bad enough to anyone to merit the way I've been treated. I need your help to understand exactly how forgiveness should work in this situation- because I'm so confused...