it's actually a choice between two really insignificant options (from MC's point of view)
Sage has a bit of flu, she's not dying, if Mc goes to see her the next day what changes?
Jill showed up suddenly, and while celebrating his birthday is a kind thought, that MC already has a plan for the day is believable. Mc doesn't know it's a great plan to let him know they won't see each other again.
I am not saying now that they must lie unconscious in a burning house, but it is not a choice that I would expect to have this irremediable impact.
the plot says you have to go to Jill, Sage we don't know how she will react, absolutely losing 2 RP may not be a drama, Jill facing Tybalt alone, given her mental recession, could be dangerous