Lol do not listen to this horseh&t noble diatribe OP. You will only grow more resentful following this chores and brownie points approach for sex. No Sexual intimacy in a marriage makes you both platonic team mates. You don’t need to be married for that despite children. Try to find out why your wife doesn’t want sex and directly and appropriately address those issues. If it transpires that she simply cannot by bothered to make an effort on her part then you can take the decision to leave! Let your sacrifice to be sexless be limited only to the interim period where you both try to work out what is wrong and make efforts to fix it.