My boyfriend of six years kissed a work colleague when drunk. In the month proceeding, he was in a dilemma as he knew it was time to commit to me, but he didn't feel ready. We've been together since 19 and he wanted some time alone. He told me straight away, and said he did it to sabotage us. He broke it off, and I moved out of our flat. He wanted me back within three days, and after three months he is still singing the same song. I love him, we are really good together, and I know he is sorry and has learned from his mistake. I doubt he will do it again. But I'm struggling to get the kiss out of my head. I really want to. Any advice?