What to do?

(Lyndon 15)
I recall a conversation we had alone one late afternoon.  He said, "Well, I suppose you are going to marry Sir Kay?"  I said yes, I supposed so.  And asked what he was going to do.  He spoke very sadly.  Said he didn't know.  He had no prospects, no talents, no education, no expectations.  I remember feeling very sorry, and helpless.