It's not natural to love or even like your work. Trying to force yourself to do so is perilous. Being burnt out is not a failure. The only fix is to draw back from work in some way. That could be a vacation, it could be not trying so hard at work, it could be finding a new job, it could be finding a new living situation. Combining any of those with new interests, or rekindling old ones, might do the trick. Constantly trying to pep yourself up is not a good idea, you will eventually face catastrophic burnout.

The only other option is self-medication. That is only advisable if you truly have no other options but to keep your head to the grindstone, and you will have to deal with the inevitable fallout of self-medication, which ain't pretty. So only turn to that as a last resort, like if you're compelled (by legal or financial obligations) to continue, where the consequences of stopping outweigh the major drawbacks of self-medication.

This is why it's so important to achieve a low cost of living and some savings, as it expands your options when you face serious burnout (i.e. you can quit your job without having another one lined up, or take a much lower paying job, etc.).