Will my penis get any bigger?

It's been 5 inches hard since the 6th grade. Im currently 18 now and just graduated high school. I also been 5'8 since the 6th grade too. since than the only thing that changed about me is my facial hair and i gained 10 lbs. right now when my dick isn't hard its only about 3 inches. I use to think my dick was big when i was little but now im thinking its small. I wanna know will my dick grow and if so when can i expect to see changes.