So just dump him. You already know the truth about him.

But you also now know the truth about yourself, which is that you're not ready to be in a healthy relationship. A healthy relationship requires trust. What would have happened if he had declined to hook up? You show up at the date, all adoring and happy, "Oh honey, you passed the test, I can't wait to spend the rest of my life with you!," and he responds, "...Wait. That was a test? You don't trust me?" And he dumps you on the spot.

You're allowed to have trauma from your previous relationships. But bringing it into your next one is a recipe for trouble. You need to overcome it first.