This I'm torn about. I know he did kiss someone else, That hurt like hell but it was something i probably would have been prepared to accept, if it was a one off and he really did regret it. On one hand i think he might have done more but on the other hand, why tell me about a kiss but not the rest?
It could be that the information about the kiss was just a "feeler," to see how you would respond. Since you didn't take that well, he wouldn't be likely to tell you any more than that. It's a cowardly thing, wrapped with a label of concern (eg. he wouldn't want to hurt you more.)
