I dont think you are falling out of love with him, the fact that this is bothering you shows that you care, I think you are deeply hurt as anyone would be, and are maybe losing respect for your husband rather than fallin out of love with him....by the sounds of it, you havent asked a lot of questions that need answering, like, why he felt the need to do it, as you have 3 young children, as a mum I know they can take up a lot of time what with the housework and all, and sometimes men can feel pushed/left out....maybe you need to think this through and ask yourself things like, how was your sex life at the time of the affair, could you have made more of an effort etc? I know I may sound harsh, but sometimes the answer lies within ourselves, and as hard as it is to accept it, the only thing we can do, is face it and try and change things...im not saying its you, but it could be a possibility, you really need to talk this though with him, ask him all what you need to know and take it from there, the fact that he has stayed with you says a lot...he wants to be with his wife and kids! Dont be hard on yourself and please ask him the questions you need answers to, at the end of the day if your not communicating your only jumping to conclusions in your own mind which is not good! talk this through, im sure you can both work this out and build on where it went wrong, I really hope it works out for you -x-