I am no psychologist or anything, but my wife starting doing similar activities when our marriage was getting stressful and rough. She has now been diagnosed with depression. She wanted to get away and hang out with younger cousins and be immature. His actions do not seem to be too far off. I would suggest sitting him down and telling him to strart acting like a husband and a father or to continue acting like he is a single man and he will be a single man. Just my .02