Would you leave your bf of 6 months because of this

He cheated and gave me an std. I found out when I rent for a checkup. I was so angry in the doctors office that I called my bf and gave the doc the phone to explain what happened. After that he changed. The calls, texts and and general attention stopped. He started ignoring me saying that he was ashamed. I broke up with him and told him he was a cornball and that he should've used a condom with the side chick. I trusted this guy and thought we were gonna be for the long haul