Too Fast to Believe, It's a Folly

I don't know what i do. I feel like i'm a selfish person ..
Lately, one of my best friends have started close with him. I'm worried about that. I have so many similarity with my friend and i think it's possible if she would like him. Just like me. And i can't blame anyone. So i always try to get over him. Because i know, whatever would happens it must be bad. The only thing i can do is to move on, forget him even if i don't want. I really have to do that! I could ruin everything if i don't.

I don't want to be a bad girl, selfish! Really!
I was too fast to trust others people think of the possibility of they. It broke my heart.
Now i don't know what should i do. But i know, my friend is a very very good person. And i love all my friend more than anything :) I trust them.This is only my folly are too quick to believe others people words.

And there's also something, he really likes another girl. I don't know exactly who she was, but he began to show that he had something.
About this, i'm tired of being tired. I'm over-thinking. I wish i can change everything. Or maybe, atleast, change my mindset ...

Trust . . .