Is He The One?

There's a question that has always been on my mind and the answer I believe to be difficult to answer... How do you know the person you are with is Mr/Miss Right?

I have recently started dating a man and too be completely honest I am scared to what my future will be. I am scared because growing up I was always a loner and the guys I had crushes on ran a million miles away from me after I have expressed my fondness of them. I am questioning what this guy sees in me. However, I like him and I am very interested. But I have a fragile heart, a heart that is already broken into pieces and there is only one piece literally still in place. Will this guy mend my heart or will he break the last piece I have left? More importantly, is he the one?