we broke up

I just broke up with my boyfriend. He was controlling, constantly put me down, and over protective. Yet he'd do something that would be funny or cute to make me forget about the bad feeling. I broke up with him because I was ignoring my friends for him and I knew he was not good for me, yet I'm still so sad. Him and his friends keep texting me saying that he's going to kill himself I'm scared that he will...I don't know what to do.