How do I say goodbye?

This person is a nice person. He doesn't mean bad and takes care as much as possible.
That just makes him more difficult to leave. I cannot break his heart and not care.
I cannot be friends but not dare to ask for more.
You have people who actually care how did I enter this frame where you cannot understand a word I say because you don't feel the same way.
I should let you go because I know I will hurt you when this all ends, I say ends because I know it will end, I am the bane of everyone's life. But I want to justify your trust.
I'm sorry but I have to let you go.
I cannot make you fight for me with me.
I cannot scar you.
Right now you might come to hate me forever but maybe that's how it's supposed to be.
I alone and you in serendipity