With an alcoholic/addict it is ALL about self-justifying their own behavior. He's only two months sober, so maybe he hasn't gotten to the part in the steps where you take responsibility for your own actions. If he doesn't, he won't be sober for long.
You did absolutely the healthiest thing you could in you situation. You have nothing to feel guilty about. Try to tune out the BS. Try not to argue with him about it. YOU know the truth, but it's a waste of time for you to try to convince him. In these situations, my standard response is, "Sorry you feel that way." And then changing the subject.