Think positively for sake of the kids, you can still save your marriage. Kaya nga kabiyak eh, its your obligation to save a lost husband. Confront him in a very calm way, make sure that he is in mood, and ask ano ba ang pagkukulang mo? But in my point of view, absolutely sex ang main reason thats why, Maybe you should try something para magspark uli ng heat between you and him in bed. And finally dont forget to ask him kung mahal ka pa nya. Thats the major thing na dapat mo i clear sa kanya para di ka nangangapa. My early suggestions are not easy to do. But im telling you its worth trying. Goodluck and godbless... :-)