Why am I afraid, And how can I over come it?

I think you have figured out the why part of your question. There are alot of people in this world who have a fear of relationships. You are not alone. Being afraid to get a girlfriend because of betrayal is niave. (no offense) You have to meet a few wrong ones before you can appreciate the right one. In time, you will overcome your fear and find yourself. You just need to be patient! I wish you happiness!