Sorry to hear about your loss ginger
I do understand what you mean, I can;t have more children and in a way it is a relief as the baby days were hard, I remember we'd do a lot of picnics in the park, he'd usually be drinking then, too
and i know what you mean about they seem to find it the way to happiness, which is a worry. I also get the feeling of being a killjoy / bore if not joining in, at times. Mine also seems to get 'bored' and turn to drink if nothing else going on, like they can't just 'be' but need to be either working, or having fun / drinking. It must be exhausting to live like that. I'm into mindfulness and thought of suggesting something like Headspace, but he's not really interested. He does go running though, some weekend mornings, but again in a kind of driven way, I asked him if he had enjoyed his run, and don't now as was told it's not for enjoyment. 
Anyway, we also have a thing where I don;t drive, so if we're going places involving driving this can be helpful with the drinking. However it often ends up in him being cross that I can't drive so he can drink, especially with social situations which he seems to find really hard without drink- it's almost a way of overcoming shyness even with relatives, I think. Sp difficult. I want to say, you are fine as you are, not boring or whatever, more fun without the booze..
Self sorry to hear about yours as well, it must be difficult every day. Is the work suffering from that too? Practically, you may find you qualify for some help with childcare if he wasn't there, not sure. Kind thoughts to everyone going through this.
Yes mine would continue without me too, but think it might help me from going along the same lines, especially with he meds issue.