In the dialogue between Mr Knightley and Mrs Weston in chap 5,--Mr Knightley said -- " She always declares she will never marry, which, of course, means just nothing at all. But I have no idea that she has yet ever seen a man she cared for." ...

"There does, indeed, seem as little to tempt her to break her resolution, at present," said Mrs. Weston.

And in chap 10, we have Emma saying to Harriet --
"I believe few married women are half as much mistress of their husband's house, as I am of Hartfield; and never, never could I expect to be so truly beloved and important; so always first and always right in any man's eyes as I am in my father's."

When Harriet exclaimed with horror that it would be so dreadful to be an old maid like Miss Bates, Emma said --

"Never mind, Harriet, I shall not be a poor old maid; and it is poverty only which makes celibacy contemptible to a generous public! A single woman, with a very narrow income, must be a ridiculous, disagreeable, old maid! the proper sport of boys and girls; but a single woman, of good fortune, is always respectable, and may be as sensible and pleasant as anybody else."

Emma thinks she has "none of the usual inducements of women to marry", because she did not need a husband to provide her with "fortune" and "consequence".