MMF I totally identify with you about things being even more challenging now that you only have your youngest at home as this is how I feel. I'm slightly better off as my youngest is 14 so I'm able to leave her for a short time at least while I go out.
As far as not knowing what to do by yourself that's why I joined the social networking club I'm in. It gave me something to do and someone to do it with. Check it out to see if there is anything similar in your area. I've done all sorts of things from going out for meals, to the odd weekend away to learning new activities (like a taster session).
I know how nice it is to spend time with your kids BUT spendig all your time with them is not healthy either (for you or son).
Me 43 XH 45 M 2.7.88 Divorce 7.10.09 Kids D20,S17 & D15
