Ignore all the people giving advice along the lines of 'suck it up, work is not supposed to be fun'. That is the talk of people who hate the idea of anyone having a better life than them.
You need to map your way out of this situation - demotivation (regardless of the cause) is bad for you and your employer. Persisting with it is unprofessional. If you try and 'suck it up' you will travel the path to burnout and damage to your health and career.
Try and identify the cause before you take the appropriate action - it could be boring/unsuitable work, a medical problem like depression or even something like anemia, burnout, poor diet/exercise, or a lack of fulfilment from other areas of your life.
You need to map your way out of this situation - demotivation (regardless of the cause) is bad for you and your employer. Persisting with it is unprofessional. If you try and 'suck it up' you will travel the path to burnout and damage to your health and career.
Try and identify the cause before you take the appropriate action - it could be boring/unsuitable work, a medical problem like depression or even something like anemia, burnout, poor diet/exercise, or a lack of fulfilment from other areas of your life.