Maybe, if you wait long enough, someone else will do your dirty work for you. It may feel easier right now to avoid doing it yourself. But, in the long run, it's almost sure to hurt you both. It's hard not to feel betrayed when the news comes secondhand. If you're worried about hurting him, don't wait for it to get more complicated. Take the blame, say you're sorry, but tell him you didn't want him to hear it from someone else.