I think it's noble to stay in for the sake of your children. One thought: perhaps it's obvious to you that your wife is ignoring you, but not obvious to her? Maybe she takes your calm, grounded presence in her life for granted and loves you deeply, not seeing how much you are suffering. I'm curious to know the efforts you've made to communicate your concerns to her? Taking her out for a nice date night, couples therapy? Perhaps your wife values you and your marriage much more than you realize and change is indeed possible.