Why do I sprain my ankles almost every year? And are my ankles still swollen from when I sprained then in july?

Consult your doctor. It is common for one to experience swelling and pain for several months following an ankle injury. Consult your physician to see what treatment options are best for you. People often times may develop ankle instability after an injury. Have it evaluated by a professional and get the appropriate treatment.
Only U can say if -- Are still swollen from last july or not. Some kids do sprain their ankles from daily activities. Or are you trying to or using heeled shoes? See your pcp to get xrays and an exam and hopefully nothing is wrong. Then get pt to start exercises to strengthen the ankle ligaments/muscles to decrease the frequency of these sprains.