The Question and Answer section for Madame Bovary is a great resource to ask questions, find answers, and discuss the novel.
Like many young women of the time, Emma followed her father's wishes. Her father received an offer for her hand, and he approved. Emma, of course, went along with his wishes. Note, she was perfectly happy with the arrangment.
As far as marrying...
I'm not sure what your question is here?
The best short answer for this question can be found in gradesaver's character analysis;
Madame Bovary, the novel's protagonist. Educated in a convent and raised in the country, Emma marries Charles Bovary at a young age....