I realized I have a shitty personality with people I don't know in person

I'm so cold and distant...not because I'm depressed or sad...I just been done dirty by so many people I once considered friends. I wish I could be more open but I can't...I have seen the ugliness of humanity first handed. I don't think I will be ever able to be close to people without have them prove themselves to me. It sucks because I can't socialize normally like other people. But it is what it is, gotta keep bettering myself.