Looking for a name of an old american romantic film , in black and white.Its about a man who meets a young girl in a park over the years he stays the same she grows up there is a lighthouse in it, which is relevant. I have only see it once and that was over 30 years ago. About as old as Daddy long legs.

Sounds like Portrait of Jennie.

Thank you , at last I can look for it and watch it again .