Is it normal that i don't have emotions/feel emphaty?
I feel completely empty all the time, not sad just empty like there is absolutely nothing inside of me, i never feel happy or sad or anything else. When i'm in a situation when i'm supposed to feel like happy or sad or another emotion i just fake it. And also i don't have feelings for anyone, neither my family or best friends, when something happens to them, no matter if it's good or bad i just don't feel anything, i completely don't care and when they talk to me about their problem i just act like i'm supposed to do like if someone is crying about something i just hug them and tell them that everything is gonna be ok, but i only do this because i know that this what i have to do when someone is hurt not because i want to help the person to feel better. The only things that i rarely feels are angry (and this only happens sometimes if i'm forced to things that i don't wanna do but usually i'm very indifferent even in these situations) or fear but very very rarely. And also i remember that as a child i care about my family and friends, so i don't know why i'm not capable of this anymore, but now i just do everything because i'm supposed to/ i'm used to do it, and very rarely i have sort of an interest (?) like i just start to do something and then i keep doing it because i like it but i still don't feel anything.
Are these things normal or i have some kind of mental disease?
(english is not my first language so i problably made a lot of mistake)