I think for me was when i bought a gift on Valentine's Day for the a girl that i thought we could be more than friends (she showed me she would want more than only friends and i showed her too) and when i wanted to give it to her, she refused it but didn't want to show me she doesn't want it. After a couple of days i heared she reconciled with her ex.

Well at that moment i wanted to punch something so hard or destory something, but Good Lord i can handle my needles.