I feel like something is missing, not interested in things you loved to do not like before, I never really thought something like this would ever happen to anyone I'm confused how something you love to do now you just not interested in it!? 
Eating, exercise anything become really hard to do you just become useless I don't know if this shit is normal. 
I feel like the only way is to ignore this feeling and actually force yourself to not be shit and useless person.