Math ability and intelligence I am glad you brought this topic to discussion because it is something I have struggled with personally as well. A couple of years ago, I would have not worried about the links between mathematical/logical ability and general intelligence, but now it is an issue that deeply intrigues me. As someone who is very interested in politics, philosophy, and current affairs, and likes to argue in the rigorous and structured way that an analytic philosopher would, it concerns me that if I lack skill in an ability such as logic, I will be incompetent in political and philosophical discussions. And well, I can tell you what I have learned:
1. Empirically speaking, research does suggest that there is a G factor, or a general intelligence. This means that an individual's level of abilitiy in domains such as literature, math, logic,writing, and so on, are typically correlated.So if you are good at math, you are probably also good at english and writing. This is not to say that abilities across all of those domains are going to be equal, they can and will vary. Neither does it mean that there are'nt people who score really high on one (e.g. math) and are notably deficient in another (e.g. english). It just means that generally speaking, abilities across these domains are correlated. For a controversial but I believe sound conversation on this, look up Charles Murray's and Sam Harris podcast on youtube.
2. There is good news,contrary to disciplines such as history, politics, and other soft areas of study, the process of learning math is different in its nature. Becoming good with mathematical reasoning requires constant exposure to making mistakes. After practicing enough times, you are able to do things with ease. Neuroscientific research has shown that there are specific kinds of neurons, I believe they are called decision making neurons (pardon me if this is not the exact scientific jargon, im no scientist) which release dopamine whenever you are right about something, and fail to release it when you are wrong. These dopamine releasing neurons become trained with enough experience to tell you subconsciously when you are right about something, and release dopamine if you make the right decision. Whenever you are wrong, they constantly rewire themselves in order to detect the pattern in any situation which will yield the right answer. So, whenever you fail a math problem, your brain doesnt like the lack of dopamine release, and thus rewires itself to be able to identifiy what the right answer is in the next circumstance. I apologize if this explanation seems a bit untidy. If you want to learn more about it I recommend the book, "How We Decide" by Jonah Lehrer.
3. I was always average on math, but begun practicing with online resources such as The Great Courses Plus, there are also other didactic materials such as the For Dummies series, or the Wiley Self- Teaching Guides. Although these may not seem appealing at first, I guarantee you they will do wonders. All you need is constant practice, if you are smart enough to be concerned about your intelligence, you certainly have the ability to master mathematics. Furthermore, once you get the hang of it, it is a truly beautiful experience to observe how everything fits in perfectly. Again, all you need is constant practice, if you ask the average engineer or economist, they will invariably let you know about the amount of hours they spent banging their head against the wall trying to solve problems. I would encourage you to learn math, it will make you much more adept at reasoning in other domains.
There is a wonderful book that talks about this, it is called "How to Not be Wrong;The Power of Mathematical Thinking" by Jordan Ellenberg. In it, he explains, in layman's terms, how viewing the world through the prism of mathematics can help you weed out implausible conclusions in affairs that seem on the surface non-mathematical (e.g. politics, history, philosophy, etc.)
Anyways, I hope this helps. And as someone above mentioned, you dont necessarily need math to be succesful, it will depend on your area of study, but I would encourage you to learn it if you are interested in problems that are political and social in their nature, it helps you a lot in learning to structure your arguments.