STD testing

My exclusive boyfriend of 4 months has not been tested for stds as I thought he had. We had clear discussions on this a few times and had both been tested about a year ago and were going to test again.Couple months later, he still hasn’t gone due to work hours and I brought it up again. He’s making an effort to set it up but as we’re talking, it’s revealed that he thought he had gone through with the test a year but realized he hadn’t. All trust in him is gone now. This was our first fight where I raised my voice at him. I am so upset my this lapse in judgement, neglect or lie, whatever it was. I really don’t know if I can get past this. Instead of being apologetic, he focused on why he felt attacked and that it was ok because his other girlfriends were negative and I was recently negative. Mind you, this means he hasnt been tested after his “wild” phase of many casual hookups. This puts me at such a high risk. He doesn’t understand, despite my thorough explaining many times that he could still have something if I showed up negative. I feel unsafe and hurt and he doesn’t see that. He only became apologetic now that he’s seeing this relationship may be over because of this. Is this normal for a man to be this nonchalant about protecting himself after one night stands? And to not understand the risk he puts his girlfriend at? I'm so lost of I should try to work this out or say goodbye now. Walking away makes me very sad but I don't want to conpromise my integrity or be foolish.