manny, i know it sucks. and having kids involved makes it worse. all i have to say is for a little while in 06 and a few months in 07, i thought i'd never be happy again, but i ended up in the best relationship i could've ever imagined. get your help, keep your head up and things will get better. good luck man.
You realize of course that this thread is going to be biased in terms of experiences? I don't think many people are going to reply and say "Gee Manny, that's tough. I've been married 9 years now and everything's going great for me! Sucks to be you!" I am not one to encourage or discourage marriage to anybody I don't personally know very well but just realize the selection bias here.