Lost my interests in things

Patient: Hi doctor,I’m male 23 years oldI feel i have lost my interests in things i liked before,it’s hard for me to decide in situations,I don’t have any close friends and anything like that,i’m not social in college.my personality test type is INTP,I’m not sure if that’s normal or not for me.(sorry for writing in ladder form I thought you may read it easier,I’m not native speaker)thank you

Symptoms: Feel sad