First, I would suggest that you gather your research. You are essentially doing a "review of literature: if you have been asked to specifically analyze the critical views of this essay. Gather your critics and read what they have to say about the piece. Then, look for a consensus. Essentially, you are looking for a similar theme or perspective that several critics share. If you can find a perspective that you also agree with yourself, this will help you. Then, remember that your thesis is comprised of two parts, the topic or subject and the writer's position on the subject. So, you may have something along the lines of "Several critical approaches to Love in the Time of Cholera all share a similar attention to the theme of ...."