I somewhat know how you feel. Your ex in the hospital need support, but your current love feel 2nd placed. I lately have put my emotion before my love. He does that a lot lately, not coming to bed to later, he seem to be drifting away.
But back to my point, it just all the stress that make you feel that way. You lose thought on piroity in your life especially when your not sure what is the right thing to do anymore.
I hope your friend(ex) is well, I've OD before, it not fun surviving it, it actually one of the most painful things I've gone through.
And in time your current love will understand on how this effect you.
Sorry for the rambling.