Talking to youself?

Haha. I find that i constantly talking to myself and i am concious of that everytime. Sometimes i do it in my head but when i am terribly tired and could not concentrate, like a rupture in a vessel, i speak to myself loudly and so happen that my landlord saw me doing it and commented on me being crazy!! Do you think i am crazy and do you think that people that talks to themselves are crazy? To me, i think its simply a mechanism to comfort myself and to reassure that whatever i am doing is correct, basically justifying it myself. I’m a quiet guy and don’t socialise much. Find it really hard to get along with people with thick sarcasm. UNfortunately most people tend to do that therefore im stuck in conversation always. What do u think?