This quote has definitely motivated me in the past to just forget people who aren't worth the time anymore. They walked out of my life, they're the ones who will learn in the future what a massive mistake they made!
"If someone wants to be part of your life, they'll make an effort to be in it. Don't bother reserving a space in your heart for someone who doesn't make an effort to stay"
This is so true. I've spent so much time trying to forge forward with friendships with people who just don't want to contact me or really stay in contact. I'm done waiting for people.