So when i was around the age of 10 i got a severe dengue fever and was wondering if i caught it again would it be even more severe?

Yes: You can get infected more than twice as there are at least four different strains of the virus. Repeat infections are usually more severe. Have a healthy diet, exercise 30 minutes/day, drink plenty of water, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/. Get HPV vaccine. Wish you good health!