Why do you always talk to yourself and in your heart?

There are many possibilities for talking to yourself:

1. You are not confident enough before you do something. You need to have a dialogue in your mind and rehearse the development of things.

You want to talk to others, but you don't know how to do it. You need to get used to it first. Then you have to try it yourself.

You can't tell others if you have something on your mind, but you need to vent. So you can only tell yourself.

Autistic people have no friends to talk to, so they can only talk to themselves!

The first three are normal activities, so don't worry. If you feel autistic, go out more and make more friends.