chump of just over 2 years here, about to change my status to chump no more.
if you have been cheated on by your partner/spouse/whoever, i cannot recommend this book enough: "Leave a cheater, gain a life" by the Chump Lady, Tracy Shorn.
I wish I had read this a lot sooner after D-Day. I wish I had had all her pithy responses, and her reassurances and repeated declarations that it is not us who are at fault, that it is the cheaters lack of morals, empathy, caring. Love is not and cannot be betrayal. I felt under such a lot of pressure to try and work things out, especially with DS4 in the picture, and never really gave myself the option to say, it is alright to say i don't even want to try. i bought into his lame efforts and false apologies. She explains so well how we (the chumps) can so often get sucked into their narrative without being able to separate ourselves out and look at our wants and needs.