TG they are men !
Many young pitchers don't throw hard at your age. It is important to keep trying as you seem to be doing. Be patient and let your body mature. Jeff Francis for example only threw 80mph as a freshman in college. He worked hard and njow is 90+. Don't let anyone tell you you can't gain velocity. I know lots of pitchers who gained velo as they matured. Some have it right away at a young age but many don't.