online dating – anticipation

I wrote a question about anticipating a response from someone in online dating. I think if I am nervous about reading the message it is as if I’m feeling the feelings ahead, right? Then, would it be wise of me to practice ahead, like “if he says he’s not interested, I’ll tell myself this” or “if he says he’s interested, I’ll tell myself that”?

Or just say to myself, either way I will be okay and either way I have my own back? (What if I’m not convinced I fully have my own back? I want to, but not sure I can).