Apathy is a lack of feeling, emotion, interest, or concern about something of great importance. Apathy is a state of indifference, or the suppression of emotions such as concern, excitement, motivation, or passion. An apathetic individual has an absence of interest in or concern about emotional, social, spiritual, philosophical, or physical life and the world. The apathetic may lack a sense of purpose, worth, or meaning in their life. An apathetic person may also exhibit insensibility or sluggishness.
Enthusiasm is a feeling of energetic interest in a particular subject or activity and an eagerness to be involved in it. it is a subject or activity that interests you very much and a desire to be involved in it.