How to be a good, well rounded person?

I'm not saying i'm a bad person, but I am not sociable with people I do not connect; meaning I don't even have acquaintances. Either I connect with you or I just don't. I also wait for people to talk to me because I'm too shy to be the first one to start a conversation. I do have manners and say Hi and all, but I just can't have a conversation! I want to be more of a well rounded person but I need help on how to be IT. I used to be a very sociable person, but I don't know what happen. I guess it's all the betrayals I had with people I considered "Friends" Thank you all, your answers will be appreciated!