My personality damages people

Hello, I just want to hear (read) your advice. I don't have many friends, just 2, they are my friend from 2005 and well all theses years I always do something no on purpose that dameges their and I am trying to change but it just I don't understand well what kind of thing or words can damages people. If you can give me some advice or just do I have to die alone?

If you want to stop hurting people(this is what I assume you mean) then simply try to take people's feelings into consideration more often and don't do things that would hurt them or you know they don't like. If you're not sure if what you're doing is bad just ask yourself how you'd feel if it was done to you.