I saw Mr. Crawford in Count Cassel too. He brazenly admits it too, sort of like Mr. Crawford informing his sister he intends to make Maria, Julia, and then Fanny in love with him.

To further the one quote he says
Count. ...But in a gay, lively, inconsiderate, flimsy, frivolous coxcomb, such as myself, it is excusable: for me to keep my word to a woman, would be deceit: 'tis not expected of me. It is in my character to break oaths in love;...