Humanities & Social Sciences

No, if you are not good at maths, economics is not for you either. However, if you like economics so much, that should motivate more interest in maths. From what you describe, I do not think you are poor in maths. Your learning experience in high school was not pleasant, but that should not be a reason for you not to try again. Try approaching again with a fresh mindset and you may find yourself turn over a new leaf with maths.
And
No, without mathematics as main paper, you are not eligible to get admission in Economics (Hons) course in best colleges.
As in Delhi University and other best universities, it is necessary to have mathematics as the main paper to get admission in Economics (Hons) course.

Educational qualifications required: Minimum qualification required to go for a course in hotel management is 10+2. For certificate, Diploma and Bachelors courses 10+2 is sufficient. Duration of certificate courses is six months to one year. Bachelor and Diploma courses are of duration one and a half to three years. Those with graduation can go for post graduate Diploma courses the duration of which is one year. Selection to most government recognised institutes is based on common entrance test. The test consists of English, Reasoning, General Science and General Knowledge. The test is of two-hour duration and is held around April every year.
Regards.