What's wrong with me .... ?????

it's hard to change, but it is not impossible. try starting a conversation by saying, hi, how are you, how was your weekend? just try to break the ice... you can also bring up a coonverstion about stuff that you like, that way you can have an idea of what to say... this might sound weird, but try talking to yourself in front of the mirror... when you talk to yourself you will find out what subjects come more natural to you... and next time those subjects come up you can join in to the conversation...