What do I do?

Hi. I have problems expressing emotion. I don't know what has caused this. But I'm at a point where I no longer feel a thing. Even if someone politely asks or just asks "How are you?" or "How was your day?" I don't feel a thing.

Have you or have you considered seeing a professional. A therapist may be able to help you get in touch with how you are feeling. Also, it could be caused by depression. So I think a professional evaluation would be a good start.
Gayle

I agree with Gayle. You could have been blocking off those emotions unconsciously and now have a habit of doing it, it could be a sign of depression, or just uncultivated social skill from isolation, etc. The best route would def be to a consult a professional who could possibly give you better options instead of speculations like my own lol.

Well, at first I was being harassed every day of my life by a bunch of people, they hated me and wanted me dead, atleast back then I felt a thing, for example anger and hatred, I've been to places where I could no longer control myself or my anger and do bad things to people, so I thought a lot over it and decided to accept happiness in the society myself by doing a few practices which unfortunately I'm not going to disclose, at first I felt happiness after a long, long time, and wanted more happiness, so I continued with whatever it is I was doing, I'm not going to say I was the happiest person because of this practice but I was still somewhat happy with whatever it was. Times passed by and I stopped doing it, since I no longer felt the need to do it, I thought this would actually lead to me being a happy person but to be honest it just made things even worse, now I get hurt way too easily, today I was having a chat with my father and he said some rude things, he said he was just joking but it made me sad inside, I took it too seriously and it hurt me. Now I feel like no longer expressing emotion, I can't concentrate on whatever I'm doing nor do I feel confident. I don't feel depressed, but at times when people hurt me sadness is the only emotion I get. I don't know what to do, I don't feel like killing myself, I just don't feel a thing. Even when people are laughing I take it as a negative sign and feel like they are humiliating me. I don't know what to do.

I don't know. Even after I learned to accept happiness I still had hatred in me that I wanted to clear out, so I wrote my hateful message to that person and after I did I felt like killing myself. I don't know if it was a stupid move or not, I just don't know. I don't even have the courage to look myself in the mirror sometimes. Every day someone hurts me my fear of expressing emotion just keeps increasing. Maybe my brain thinks if I express emotion something bad will happen, or whatever. I want to do things, but I can't. I just wish there was a way I could express emotion like other normal people.