Apparently this node is true.
When they say they've done too many bad things in their past, and fucked up too many times, and that it's too late to become what they feel they should have been, it doesn't matter how much you try to correct their pessimism. No matter how much you try to reinforce that they aren't hopeless, that they really are a beautiful person, and that it isn't too late for them to accomplish their dreams. If they don't love you, they'll just be annoyed that you're trying to be there for them when they want someone else there instead.
When they say the things they most desire are to feel loved, wanted, and cared for; when they say they want people to know when they're just in a bad mood and to not hold any grudges against them for their frustrated bursts of anger; and when they say they just want a shoulder for them to cry on, understanding that they're frustrated by sadness and not hatred... It doesn't matter. They're just saying that. Unless they really love you, they'll never see what you're doing. They'll never appreciate it. They'll just say your persistent attempt to be friends is an annoyance. Your determination to not give up on them as a human being, and to still offer your friendship to enrich their life is more harassment than friendship in their eyes. You can't change that.
You can't reason with people who don't love you. You can't present your good qualities, because they don't care. Some people are just too selfish and short sighted. They may continue acting towards some guy across the country in the same way you act towards them. They may be to someone else the exact same way you are to them. And nothing you can do will make them act reasonable and realize that you're as heartbroken as they are. And they're incredibly mean for never letting you talk to them the way they talk to the person they are still pursuing.
And there is no satisfaction in knowing that their double standards are probably what makes them unworthy of having that person they love love them back, because you love them and you really don't want to think such thoughts about them.
But you think them sometimes. You can come to those conclusions. Because you are who you are, and that's why she doesn't love you and never will. Because you can't stop your mind from getting frustrated by her lack of decency to at least remain friends and let you keep trying to make her love you, like she keeps trying to make him love her. She can see that fault in you, and you can't make it go away. Because you need her to become a better person, and she's not good enough herself to help you it seems. Some things just always suck.