Mind set

My sister told me, 

"You told me that right now, you feel that goodbye is just around the corner, right? I realized, you feel that way because you've already set your mind to feel that way. That's why every good thing he does for you, you seem not to appreciate it anymore. But you know what, try changing your mind set.. then maybe things would still work out."

I don't know, but those words were so powerful to me. Because of what she said, I realized that yes.. it's because I've already set my mind to whatever I'm feeling right now. I always tell myself that the end is near, I always tell myself that he doesn't really care anymore, I always tell myself that his love for me's already fading.

But what if I try thinking the exact opposite of it? Would things still be.. alright?