You might want to try an AA group. I really liked Artists Anonymous. You can go to AA online and find online meetings i think. I see it as a resource for support for all sorts of issues. If nothing else there is tons of reading available.

Stream of consciousness: The way you are anticipating her future absences, it feels like you are trying to fill a sinkhole, instead of trying to figure out why the sinkhole keeps occurring. I understand that one needs to accept the sinkhole before one can fix it. But theres a saying, dont count your sinkholes before they sink. Dont love your sinkhole too much. Dont get too comfortable in it? Dont start decorating it. Geez thats what im doing with my hoarding, its a very weird decorating.