No more periods?

I am 19, and I started my periods at age 11. They have always been extremely painful. I am not sexually active, so even though I know that taking the pill can reduce the pain during menstruations, I don't take it. I am sick of periods and the discomfort that comes with them, and I am 110% certain that I never want to have children later in life. (I know most of you think that this can change since I am so young, but I can seriously tell you that I've always felt this way for many reasons.) Therefore, I see periods as something completely useless in my case. I was wondering if there was a safe and medically-approved way to stop having periods "forever". Potential sterility isn't an issue for me at all. The only things I don't want are unscheduled bleeding, menstrual cramps (without blood), reduced sexual sensitivity, or any kind of risk for my health. I'm also looking to avoid any surgical intervention, but if it's really the only option, I might consider it. I'd be very grateful if you could suggest anything. Of course, I will talk about it with a gynecologist, but first I want to know more about my options.