I have a problem with being nice to people. I can be sometimes, but i always insult someone or say something insulting. I don’t mean to do it and i do apologizes. My friends aren’t bothered by it,they say its just sass/Tsundere, but it bothers me and I would like some advice to stop it. I mean the first thing I say to people always comes out wrong or the tone of my voice sounds harsh. I really don’t want this to affect my future or relationships.