I Should Kick Butt

You know that feeling when you find out somebody you liked was dating somebody else while they were leading you on? You know the sinking feeling in your gut, the anger, the shaking of limbs, the clenching of the fist, the darting of the eyes, the brain reliving every stupid minute? Quite some time has passed and I don't even talk to that person anymore. I shouldn't even care, but for some reason the news hit me like a completely unexpected ton of bricks. And I can't throw those bricks back. Or can I?

I will do no harm, I will do no harm, I will do no harm.

No matter what harm is inflicted upon me, I will do no harm. It sounds good in theory.