Do you have a therapist? If not, I suggest that you find one. This person was just lashing out at you in a way that he new would hurt you and it did. Now, you need to let that go and seeing as you can not on your own, I suggesy a good talk with a therapist. You are not worthless. He did not think that when you were helping him learn English, just when you rebuffed his flirting attempts. I am often hurt by what others say to me. I am just lucky that my father is a therapist and I can call him any time of day and talk. But I am looking for one that is close to home that knows less of my personal history.