4. If he promises to break your heart, he will
I was seeing a guy who told me point blank to my face “I will break your heart as hard as I can.” My first reaction was to tell him he was a good person.
He was most certainly not a good person. He was barely capable of being an okay person. I seriously wish I could go back in time, kick him as hard as I possibly could, grab Past Me by the hand, and get the hell out of there. It would saved me some major grief.