How can I get my hair to grow longer faster?

Truth is, you can't make hair "grow faster". I had this problem about a year ago, and you just have to wait it out. Just keep your hair clean, but don't wash and condition it everyday. Try washing every other day, and conditioning twice a week. Brush your hair regularly using a wide toothed comb, especially if it's wet. You mentioned you don't use heated appliances, but if you chemically straighted, dye, or do anything at all to your hair, try taking a break for a while and let it naturally repair itself. Also, if you use rollers(non-heated) in your hair, try to just let it be natural. Avoid tight ponytails too, pulling the hair too tight will just break the follicle. You could also try hair repairing masks. I'll include a link for one of my favorites! I hope this helps!