Why won't HE drop this??? Why won't YOU drop this? What happened to only business? Let go, this is getting you nowhere and is self-destructive.
Would you like your H or BF to go mow the grass of his XW? You aren't his romantic partner, he does not treat you like a friend. This continued enmeshment is not good for anyone.
Take care of yourself. Stop talking and bantering with your XH. Separate your lives. Quit trying to figure out him and his motives.
If he texts you something irrelevant, just ignore it, or dismiss it politely-- "Good, thanks."
Right now, you are just as involved in keeping this enmeshment going and keeping yourself wrapped around your own axle as your XH is. Just stop it. You are divorced. Your lives are separate. You aren't going to be buddies. You have a son to co-parent and back child support to collect.
As for XH's comment about taking care of your son, either ignore it or address it directly: "No, you are not taking care of our son. You are not meeting your legal obligations with respect to support and as a result our son is paying the cost of your unemployment."
And, by all means, take managing XH's time and his R with your son off your to do list ALTOGETHER. (Glad to see you backed off the father's day thing.)
