Because her father, the judge, chased Ashley Longworth away. The judge disapproved of him.
Almost 40 years later she would capture the hearts of America by her portrayal of Emily Baldwin. “‘The Waltons’ was a real joy and a magnificent tribute to Earl Hamner. Earl gave me two things, don’t you know, that I will always cherish and be thankful for: Helen Kleeb (Miss Mamie) as my older sister and the TV series ‘The Waltons’......and he gave me Ashley Longworth. I think you ought to know that Ashley has never come back. In case you see him out there, please tell him to return. I have some of the Recipe waiting”, she said with a smile and a wink.
He never came back.
Helen Kleeb (Mamie) passed away on 12/28/03 at the age of 96
Because her father made sure the guy left
Synopsis of The Waltons: The Legacy
Having spent a lifetime pining over her lost love Ashley Longworth, Miss Emily Baldwin (Mary Jackson) is ecstatic when it seems that Ashley has returned to Walton's Mountain -- and more miraculously, he hasn't aged one bit! Actually, the new arrival on the Mountain is not Ashley Longworth but instead his look-alike son, Ashley Jr. (played by a pre-"Commander Riker" Jonathan Frakes). But Miss Emily refuses to accept that the younger Longworth is not her former sweetheart incarnate...and it is this delusion which may prove disastrous when Ashley Jr. begins courting Erin (Mary McDonough). Meanwhile, John (Ralph Waite) is finding out how difficult it is to raise daughters without the help of Olivia, especially when Elizabeth (Kami Cotler) asks his advice before purchasing her first bra. ~ Hal Erickson, Rovi
No Miss Mamie never did. She thinks of him often. Her sister is Miss Emily.
Sorry, I get the ladies' names mixed up... Miss Mamie, perhaps?