Eve Without Respite (1963)

A young man in a cafe is attracted to a girl sitting at another table. He would like very much to approach her but he is very very shy. So, in Walter Mitty's style, he takes refuge in his fantasies, in which he finds it easy to be seductive, saving his lady from every possible and imaginable danger. The trouble is that those who win in their dreams often lose in real life. Except that at times real life surpasses imagination.