Am i emotionless or do i lack of empathy if i can feel anger but not much other emotions ? is possible to feel only one emotion?

Get help: You've posted numerous messages over the last week or so with questions about depression and antidepressants. You sound pretty desperate. It also sounds like you're being treated. If you have a psychiatrist, you need to let him know. If you're not also getting psychotherapy, think about it. The last resort for refractory depression is hospitalization & electroshock. But I think you CAN lick this.