Am I being too demanding or...(need insight into a man's - and women's, why not - mind)?

You should definitely be having this conversation with HIM. Don't assume that you are being childish because he is 11 years your senior. If he is neglecting you, because he is so caught up in his online contacts, you have a reason to be 'grumpy.' Still, it won't resolve itself right? You need to tell him how you feel. Though the passive aggressive move worked Sunday, don't rely on it. That kind of behavior doesn't really solve anything. Good luck!