I need courage to approach her

I am 36 years old and not yet married. There is this lady I really love but whenever I approach her to tell her how I feel, I lose all my strength and confidence and just find myself walking away.? I don’t know how to approach her and tell her that I love her, yet I feel that she is the only one for me. I have never loved anyone like this, to the point of wanting to marry her but for this lady, I really want her. Please help me…

{Stephen}