Quite simply, high risk = high reward. You want the best relationship of your life my friend? Open yourself completely! The hurdle that is known as Fear of Commitment exists in every guy's mind (and who knows maybe every girl's mind too). When the time comes that the relationship begins to become very serious, look at your girl and decide to yourself whether or not you are a better man with or without her. If in the back of your head you know this girl is what you need, then take a deep breath and jump over the hurdle. If you wouldn't call this girl overly-special compared to any other girl you've dated, maybe it's for the best that you don't expose yourself in a way that would hurt you when the time came to part ways.

You gotta do that thing you're scared shitless of, it gets easier over time