Although there are aromantic asexuals who do not experience the instinctual emotional need to be in a romantic relationship, many asexuals seek monogamous partners and value intimate connections just like sexual people.
However, if she Emily Brontë was asexual, she likely was not aromantic (see chapter 2 for distinction between sex and romance), or at least she had a high-level understanding of romance, as she wrote one of the most intensely romantic novels of her time, Wuthering Heights.
2012, Anonymous, "http://issuu.com/scrippsvoice/docs/volume_xvi__issue_four Pandora's box: The stigmas surrounding aromanticism", The Scripps Voice (Scripps College), Volume 16, Issue 4, 1 November 2012, page 5:
No, just because I’m aromantic does not automatically mean I am also asexual (I happen to really like sex).
Anna is an asexual, aromantic. Before discovering those terms, she assumed herself to merely be unusually disinterested in sex or relationships.
2012, Olivia Gordon, "http://www.telegraph.co.uk/women/9651265/The-moment-I-realised-I-was-asexual.html 'The moment I realised I was asexual'", The Telegraph, 12 November 2012:
'I let it slip one time at work that I’m an asexual aromantican asexual who is also not interested in making romantic attachments, and they think it’s absolutely hysterical,’ says Jean Wilson, a sales assistant and 63-year-old grandmother from Banbury. 'One of the women I work with said, “I don’t think you’ve met the right man yet.” I said: “Trish, I’m 63. If I haven’t met him by now I don’t think I’m going to.”’