I know a case where a girl was going out with a boy who her parents were against. The girl INSISTED that she wanted to marry him, so the father made a deal with her.
He told her to give it a year. If he is still available in a years time, she could marry him with her father’s blessing. BUT, in that year, she has to go out with any other shidduch that comes up which her parents agree to. She did, and got engaged to another boy!!