Let's phrase is differently then.
If you have a responsibility
(which is, for example, having to take care of someone (like parents, siblings or children), then you have to get your shit together. Because it's not about you. If you find an alternative, so that someone else takes over the responsibility, take that opportunity.
If there are no responsibilities
to whatever depresses you, you can (and in my opinion should
) walk away. It's your life after all, and you only have one of it (unless the "What Happens After Death" discussion thread takes a different turn
), and in that case nobody has the right to ruin it for you.